Early pregnancy can be tricky with what looks like a period. It's not often implantation bleeding though as in reality, not too many women have that. You read about it but I don't have a single friend who has ever really had it. :>) But hormones cause us to spot, etc. Irregular bleeding at the time your period is due is not uncommon and that's what you describe (common for newly pregnant women). Or it could just be hormones acting wacky. If your period is due and you didn't really get it or it was wacky, you can take a pregnancy test now. You don't have to wait until June 1. An at home test is very accurate (read in time frame though that instructions say). Use first mornings urine. Remember, if you are actually pregnant, you would not have a period at all. You'd only have some spotting. Because your lining wouldn't wash out if pregnant (which is what a period is). So, that probably didn't help but really the best you can do is to take a test. Are you trying to get pregnant?