please read this, so depressed and unsure of what to do

This is what my stomach looks like after eating just a little bit of a salad and some yogurt. I'm so lost and unsure of what to do...this is a long story but please try to read it.

So, in July I I had protected sex for five minutes with a condom and he didn't ejaculate. There were no holes in that condom and I wasn't fertile anyway. When I was fertile the worst we had done was I had given him a blowjob and handjob and he finished in my mouth, I wiped my hand off on a towel and maybe touched myself but my hand was for the most part dry and all that could've been on it was maybe Precum and spit

I was worried I was pregnant somehow, and took a test after a lighter period I got that month which still lasted my usual five days with bright red blood, it was just less than usual.

It was clearly negative. 

In August I didn't have sex, I wanted to wait till my next period to confirm I wasn't pregnant from July. I felt awful that whole month. I took another test before that period and it was negative, and actually went to the doctor to get put on birth control that I was going to start after I got that period. They did a urine test before prescribing it and it was obviously negative.

I got my period, and started my birth control the following Sunday.

I've now been on it for two weeks and I'm absolutely miserable and scared. Im still scared about the pregnancy risks from July, and I'm having so many side effects that are possibly from starting the birth control. I'm nauseous, bloated all the time, no matter how little I eat, I get headaches, acid reflux, a feeling of fullness in my lower stomach. I pee a lot, my discharge has been all over the place, I'm so emotional and moody and feel depressed. I feel like I'm falling apart. 😔 I've tried to start eating healthier but my stomach always feels awful 

Also, I'm constipated and when I do go to the bathroom I have diarrhea.

I just don't know what to do with myself. 

I would appreciate any advice 

Thank you 😞