I Have A Cycle That Is Anywhere From 28 To

I have a cycle that is anywhere from 28 to 35 days. I had a uti around the time my period was due to start. I ended up being about 10 days late and when the "period" did show it was very light pink spotting only when I wiped the first day, barely even that the second day. The third day it was more of a light bleed on and off. Didn't even fill half a pad. The next day it was back to on and off pink spotting. That was yesterday. I'm always 7 days and very heavy the first 4 days then gradually decreases to stopping. My symptoms have increased everyday. Started out with just occational tender nipples then went to backache along with it and bloating with waves of nausea. Now I can add headaches to that list as well as today I noticed ALOT of clear discharge that makes me feel gross and I keep having to go to be bathroom to clean up a bit. I took a preg test today and it was neg. I don't know what to think. Was it just a weird period or did I just test too early? Any advise would be great.