confused

hello hi

so i was supposed to get my period on june 4th , it has not started .

as you know , most of the world is in quarantine so i havent had sex prior to june 4th & i got my period in may so pregnancy isn’t really a worry here.

however, i did have raw sex on june 11th & sometimes if my period is late itll start after ive had a lil sex but it hasnt . so im confused as to why my period is so late & ive had unprotected sex in the past couple days so theres a little bit of a worry here

this tissue like i guess discharge came out of me after i showered today ???

has anybody maybe been in this situation? maybe have any ideas of an explanation ? should i be worried about the unprotected sex i had the other day if i was supposed to start my period on the 4th ??