Help!!

So I never got my period in April. The beginning of may I thought I got my period it was heavy the first day and then light the rest of the days but only lasted a total of 3 days which isn’t normal for my period at all! Just now I realized some spotting in my underwear and when I wipe to pee, it’s a very faint light reddish pink colour almost. If at the beginning of may I had my period then my period wouldn’t be due for another week and half to two weeks almost. I haven’t really had any symptoms except a bit of cramping here and there and both me and my boyfriend have been extremely tired! Do you think at the beginning of may I had implantation bleeding and now I’m having pregnancy spottings? Or is my period just changing and out of whack?