Morning after pill- HELP

Hailey
On May 29th my boyfriend and I had a little accident with the condom. After having sex his cum leaked out of the bottom of the condom and all over my area. I took the plan b pill within 24 hours. I experienced some spotting over the month of June, but I missed my period. I took 3 pregnancy tests (after 4 weeks. 2 clear blue, one from the health department) all came up negative. Has this happened to anyone else? Comments? Advice? Please help.