Did the plan b work

HELP!

I had unprotected sex June 24th, (I had just ended my period the day before) I took the morning after pill the following morning. June 30th I was spotting/ bleeding for 3-4ish days not sure if it could classify as a period because I normally have awful cramps and heavier flow. I was supposed to get my period the last week or the second to last week of July, and i still haven’t started (today is August 2nd.) When should I start getting worried. I know the morning after pill may cause bleeding and delayed period, but I can’t help but panic. I don’t have any symptoms either.