In the wake of the Las Vegas shooting, it kinda feels a bit stupid to post some good news.
But I just weighed myself a little while ago, and I've gained about 3 pounds in a period of about a month. This is great for me, because I have a really difficult time gaining weight, because I have a high metabolism. Back in my senior year in HS, I used to starve myself sometimes, and I had lost quite a bit of weight because of it. My old doctor and my parents were concerned about my weight (I wasn't severely underweight, but still underweight), so I started eating a whole bunch, and drinking protein shakes, and all of that. And I've been trying to keep that up ever since I got to college; going to the dining hall a whole lot. I also bought a whole lot of protein bars at Wal-Mart. I got sick about a few weeks ago, so that kinda threw me off for a little bit; I still ate, it was just really annoying because I couldn't stop coughing. But ever since I recovered I've been eating more.
I know weigh 94 lbs. Hooray for me!
Most people battle obesity and probably don't understand being "too thin" at all.
I was always one of the skinniest kids in school, even into my first couple or three years of college. I think that it's even worse for a guy than a gal because guys are supposed to be strong and are expected to weigh more than girls. I also had a little infatuation with muscular athletic bodies, but I was too ashamed of my skinny to ever step into a gym. Finally, around my third year of college, I did step into a gym, and I had fairly decent results. Not the amazing results that I had seen a few guys with rare genetics have, but I definitely gained weight, and mostly muscle mass. Then, as I reached my middle twenties, marrage, home ownership, career, and becoming a parent became more important than the gym.
During the next few decades, I went from being a lean 175 (still a little skinny for an average height male, but at least I was in the "normal" range) to a really fat 250 with no muscle at all. In my late fourties (I'm 52 now), I started going back to the gym, and I realized how much I missed it. Within a year I started getting compliments (sortof), like people constantly asking me if I workout, or how I lost weight, or how I gained so much muscle, or "how much do you bench" (I really hate that question, but it's still a compliment because they are recognizing the hard work that I put in at the gym).
Keep using the protein supplements, but if you aren't doing any strength training, your weight gain is mostly going to be fat, and by the time that you get to whatever it is you consider a normal weight, you will be what us gym rats call "skinny fat", where you are normal size, but below normal in muscle mass (its a lack of muscle mass that most of us skinny people have), and you will not look any more healthy at an average weight than you do now at a skinny weight.
A lot of gals have a fear of becoming "too bulky" from weight training, but honestly that's not going to happen. I have seen gals your age who are pretty serious about their weight training, but they only gain four to five lbs a year. Females rarely have the testosterone level to gain muscle mass very fast. Most of those really thick muscular ladies who are bodybuilders or top level athletes or cross fit competitors either have very rare freaky genetics, or they take tons of black/gray market anabolic drugs.
Anyhow, it sounds like your diet is already "on point", if you added a serious weight training workout to that diet, you would look awesome in no time flat. Ladies don't have to gain massive amounts of muscle to have that toned athletic look, most average height female fitness competitors/models only weigh between 110 and 125 and some of the shorter girls might not weigh that much. It's really not about the weight, it's about the curves that having more muscle create.
In my case, I spent most all of my youth being overly self conscious about being skinny, and then a decade (or two) self conscious about becoming fat. I don't have that many regrets in life, but one of them is not starting progressive resistance training at a younger age, and not continuing it for lifelong fitness and self confidence. Let me encourage you to get into a gym, and to stick with it.