Having a period while still feeling pregnancy symptoms?

Has anyone had pregnancy symptoms, like heavy tender breasts, severe fatigue, heightened sense of smell, a general 'foggy' feeling in your head, etc. and gotten a period (albeit a couple days later than expected), that started out spotting, but progressed to a slightly slower flow than a normal period, with very mild cramping and a very small amount of clotting? For 3 and 1/2 weeks I have been experiencing ear;y signs of pregnancy after having had intercourse with my bf around the time I calculated to have been my ovulation time. I could swear I was pregnant, but the best I got from the HPT's I took was a faint faint positive line that appeared a few hours after the test was done (I know you cant really rely on that, as the directions on the box says). Im not even in my fourth week, so its my understanding that I may not have enough hcg in my urine to get a positive result right now. But should I even try at this point since I have my period? Usually PMS symptoms, like heavy and tender breasts and fatigue go away once I start my flow, but this time they havent. Could I still be pregnant? Anyone experience this and have a health pregnancy and child after all?