Guys advise me I not know what’s happening to my system

Since last year April I had a miscarriage and since then I’ve been trying to conceive but it’s not happening and my period dates keep coming earlier than it’s supposed to like 2 to 3 days earlier sometimes late. Even though I make sure I have sex with my husband throughout my ovulation days. Just this dawn my husband and I made love only for me to wake up this morning and see blood even though I’m supposed to start menstruating on Friday. Can it be implantation blood?? Kindly advise.