I am about 2 days late. My period is always on time

I am about 2 days late. My period is always on time. Even early sometimes.  I don't feel like myself. I lost some weight and I have been having pressure on my lower stomach. Some white clear discharge. I had sex on the 7th day of my period. Thing is my period lasted for 8 days right around the time i was ovulating. Did not use protection (spare me the well that was stupid comments). I cant keep food down. When i do i am nauseous. Oh man, and my mood goes from mad to happy to sad. I have never been so tired. But my boobs are not sore at all. Haven't been peeing alot just at night it will wake me up. I also think i might have a UTI. I dont feel sick, like i said i dont feel like myself. I took a pregnancy test like two weeks ago because i was worried and it was negative but people had told me it was way to early to take a test. Help?