My body is so confusing...help a girl out

Last month around this time, I became very ill with a cold and sinus infection. It took a while to get over, plus, I was on my period while ill. I was prescribed some antibiotics that I took, and I noticed about two weeks later that I had pain when peeing, soreness, itchiness, and so on. I concluded that I had a UTI. I bought some summers eve and it seemed to disappear fast. But the past few days, I’ve been feeling those symptoms again and then some, but worse. My vagina and surrounding areas are very sore, tender to the touch, I burn when I pee, and I have spotting. After frantically searching google, I concluded that I most likely have a yeast infection/vaginitis from the antibiotics again (I may or may not have taken a few in the past few weeks because of my suspected UTI mentioned earlier). It hurts when I sit, so I bought some cream from target and I just used it for the first time. My period should be here later today or tomorrow, so this should be fun. Does anyone know what I might actually have? I have finals, so it’s not really possible for me to go to the doctor right now...