plan b side effects…help!!

Hi ladies!! I posted a few days ago because I messed up…not on the pill and my boyfriend and I had unprotected sex during which he came in me. It was 2 AM cycle day 13 and I took plan b one step about 10 hours later. I'm really worried and my nerves are getting me and I'm just super concerned as to if I may have ovulated before I could take it. I have a 29 day cycle typically and CD 1 was February 28th. I'm having some cramping and white discharge, cervix is high and closed. Concerned about if it worked, opinions??