Hello, I've been trying to conceive , had sex the day before an of ovulation {after getting a positive ovulate test}... I starting bleeding on day 25 of cycle , I'm always 28day cycle.. I bleed heavy all day , but since had very little smear bleeding almost nothing today {three days later }always a 7-8 day period person. I am nauseated in the morning , tired, hate thoughts if ice cream. Headaches and horrible taste in mouth. Can I still be pregnant ?

I wouldn't bet the farm on it. You had a period which says that you're not pregnant. Periods, now that you're paying attention to them more, will be heavier or lighter depending on when you start or just the direction of the wind that day. It is hard to predict, but having had the amount of blood that you did, I wouldn't expect that it took this month.