many different symptoms, PSOC? Thyroid?

I am a 21 year old female a worried about my health. It seems that recently things have gotten worse and cannot tell if I am suffering from stress/depression or something serious.
I get uncomfortable pulsing on the left side of my neck and uncomfortable feelings in my chest. Not pain, but it feels like my heart is flipping over. I recently had nose surgery and still have some blood in my snot, it has almost been a year since my procedure. I have a pain that lingers in my right leg when I sit too long. This is not constant but I feel a sharp pang from my buttock to my shin. I have a very tender spot right beside/under my left hipbone. It feels like a bruise when I touch it, but there is no marking on the surface of my skin.
I also have bloating, thinning on the scalp, and really dry hands/feet and legs. I have blurred vision, trouble concentrating ( my mind feels blurry) and my memory is has been getting progressively worse. When I do not eat for 3 hours I literally feel like I am going to fall over.

I get tingling in my legs and arms, and they fall asleep fast when i sit cross legged or lay on my arms.

I also get up in the middle of the night to pee; it feels like a have huge pressure my bladder ( and when it is full it sticks out, I look pregnant) and basically have to run to the washroom. I am also constipated sometimes ( i eat tons of fiber, really healthy. almost no trans/sat fats and zero fried foods/processed goods.) I walk everywhere and always take the stairs. I used to jog regularly last year but my chest pains are worrying me.

I suffered from anorexia for 4 years and have not had a period since. Currently, I weight 130 at 5'9.5 which is low, considering I got my last period at 140. I am trying to gain back weight in a healthy way, but I have a fast metabolism, and even if eat lots of carbs I only seem maintain my weight. I am also vegetarian, but rarely eat nuts or eggs, just peanut butter. I take b12. omega 3 and a multi vitamin.
I made an appointment with my doctor to go on birth control to try and gain it back.

I am in university and get very anxious at times, and cry for no reason. I feel consumed with these symptoms and very alone. I cannot focus on my work and lack motivation. I just want to sleep and not think about them.

The last time I got checked out was last July. My blood work was fine, and the doctor did a physical exam before my nose surgery, in which she felt no lumps in my stomach.
I keep thinking that if I gain more weight a lot of these symptoms will disappear. The only thing I am worried about is my periods and the tender pain in my pelvic area, which feels like it appeared over night. (PCOS?) I desperately need to feel normal again and live my life. my doctor seems unconcerned, but i fear the worst. :(

Any advice before I visit her next week? I need more opinions.
Thank you for any feedback