plan b

Hey guys so last August I had unprotected sex and I took plan b and I had bleeding for 5 days after taking it. My period was late and I didn't get it until September 23. Last month on October 25th I also had unprotected sex and I took plan b once again about 20 mins later of it happening. He did not cum inside of me but I took it just in case. This time I did not have any side effect symptoms or bleeding after taking plan b. So I am extremely worried about it. I have not gotten my period still. What should I do? Please help