need help?!??!?

I went to bathroom today &I there was a spot of bloody discharge on my underwear. But when I wiped there was nothing. It's been about 2 weeks since me & my husband has had sex. He finished in me like he always does. I was cramping yesterday but there was no blood til today. Could it be my period or implantation bleeding? Thanks in advance. I'm really wanting a baby so I'm hoping it's implantation bleeding.