Suddenly irregular periods?

Lyssy

I had two cycles that were really long (35 & 45-ish days with no period) and now after my period ended in July, I only had about 10 days with no period. This period started on August 7th and has not stopped since. It has occasionally slowed down but it's been at about a medium/heavy flow everyday.

I've tried to get in to get my doctor but they have no appointments available until the end of September and I don't want to wait that long. I'm hoping someone on here might have an answer. I put some more details below but feel free to ask more questions because I really need help lol😅

I feel like there is probably something wrong but I have ruled out a few thing

I'm not pregnant (tests came back negative multiple times)

It's probably not a yeast infection because I did a yeast infection over the counter medicine

I took antibiotics for a UTI ( I was able to get that medication ordered over goodrx but they can't do anything else besides that)

Has anyone else has this happen and if you did what was it? Any thoughts on what could be wrong?