What’s up with my period


I was supposed to get my period last Friday, March 30 today is April 6 and I still don’t have it my husband and I are trying to get pregnant but whats happening is I’m wearing a pad just in case but there’s only blood when I wipe and it’s so minimal that it looks like it’s not even there and some days it’s more distinct on the toilet paper and never in my pad what the heck is going on Please help