Could i be Pregnant?

I went to my local health department a week ago and got a negative prego test, Ive been slightly nauseous lately. Ive been having headaches atleast every day for a week or so. My are very sensitive one of them actually started bleeding a little not sure if that has anything to do with it or not but neways i peed today and noticed a real light pink discharge if u want to call it and i went to the store as soon as i smelled fish i got so nauseous that i completely lost my appetite. My periods are irregular so i don't know when i'm going to get my next one. I had some slight cramping a few days ago but nothing bad. I'm not sure if i should retest or not tho...