weird periods!

Lucy
This is my first month ttc and my husband and I bd when I thought I may be ovulating so convinced myself for the past 2 weeks that I'm pregnant lol. Anyway a few days before my AF was due I had one spot of pinkish white discharge then nothing. Then 2 days ago I thought my AF came a day early (reddish/brown) then nothing since! I did a HPT which was negative. I'm having some cramping so don't know if it's just my AF being weird or I'm pregnant! Also I do sometimes get irregular periods but they have been 28days the last 2 months. Anyone else had this?