HELP please🙏🏼 Is there something wrong with me?

I'm going to try to keep this short. In November I had my first ever yeast infection. Then in January I had my first UTI as an adult (I'm almost 19 and I would only get them as a young child). During my UTI I got terrible pain in my left lower back, very low--lower than the kidneys. I took antibiotics so it went away (I had a second test done). Then at the end of Feb/beginning of March I got bacterial vaginosis. I took medicine that made me have really weird side effects (extreme confusion, dizziness). I supposedly got all better BUT during this entire time I still had the left lower back pain. I had the most severe cramps of my life when I was supposed to start my period but then they just went away. I am now two weeks late for my period. I took two pregnancy tests: both were negative. I was supposed to go to the doctors but my appointment got canceled. So I'm here. What do you ladies think? Had anything else similar to you? Thanks!!