Period is 10 days late

Cristi

I took a plan b in december so idk if that’s the reason for my period being late. But i also think it pushed my fertile week further becuz i did take it during my fertile window. Hubby and i had sex 12/26, 12/29, 1/3, and 1/4. We had sex on 1/9 and a few small clots came out after intercourse. I’ve taken 3 tests already and to me they seen negative.... but i looked at the 2 i taken lately (one from this past Saturday and one from this morning) and there’s a small 2nd line that looks invisible. Past negative PT haven’t ever shown a 2nd invisible line. May be I’m trippin or stressing too much on it but can u ladies please look at the pic so i know I’m seeing things or not thank you i really appreciate it