Hello, I'm new here

I went to my doctors last week because I haven't had a period for over a year now (none of the pills I was on regulated me, and ever since I had a period from 13-22 has never been regular); i'm 23 years old, and tomorrow i'm having blood tests to search for PCOS, underactive thyroid, however, when we were talking he did mention infertility and premature menopause. He didn't ask for my symptoms, which i'm a bit concerned about.
this is what i'm experiencing:
1. Constant bloating - currently I look about 4/5 months pregnant, which is scary. I'm really concerned about my stomach, it is swollen, it's hard, and quite sore, almost as if I have period cramps. Not sure whether I should mention this tomorrow to the person taking my bloods.
2. Weight gain, i'm an active person, but it seems no matter what i'm doing to maintain a healthy weight, it isn't working! I've put on so much weight throughout the year, and I've gone up a couple of dress sizes

3. I have awful mood swings - something I am not used to. One minute i'm absoloutely fine, and then the next, i'm either crying, sad or angry.
4. I have to be forced out nowadays, I just have no enjoyment in doing anything.
5. Sadness - mainly when i'm left alone, or before bed; I just get randomly upset, and panic, and cry.
6. Anxiety
7. I had bad skin anyway, but I noticed my acne is getting worse.
8. if anyone knows me, they know I love my sleep! This is something new, I always slept well, never had trouble, but quite recently, I'll go to bed at 10, my normal bed time, and as soon as I get tired, or want to sleep, my body suddenly wakes up and i'm wide awake until about 3am.
9. i'm generally uncomfortable; be it with my stomach, my self image, the way I look and act. I'm just uncomfortable in my body.
I'm genuinely scared, I know I shouldn't be, as we do not know what's wrong as of yet, but I don't know. I feel as though I cannot really speak to anyone about this. I feel trapped and scared that this is a likely scenario, and a possibility in my life.
Any advice?