Help what do I have down there?!

I'm really scared I have an STD. I just assumed it was a yeast infection so I started to take monistat and it's the 7 day treatment and I am on the 4th day. In the mix I also got my period and weeks before I had extremely bad acne which I never tend to have ever... and mine was extreme so I played all of this up to be hormonal embalance but now I am scared. It hurts extremely badly when I urinate to the point where I've stopped eating and drinking so I won't have to go and I am scared my yeast infection is starting to go to my throats because it is sore and I'm getting little red itches dots on me (only 4) two on my leg one on my neck and one on my arm. Please help me without judgement I am young and nervous. I've never had a yeast infection or a gyno appointment before.