so i had sex feb 15th, the condom broke he did not finish but i took plan b because perhaps there was pre cum. about a week after on feb 22nd i began spotting it lasted until feb 28th, no bleeding the 29th. then march 1st i began spotting again on march 6th the spotting became heavier and it was what i thought my period because usually i get my period around the 6-9 of every month that heaver bleeding lasted until the following day the 7th. by the 8th there was no bleeding and there has not been any bleeding since then. i took 2 pregnancy tests one on march 17th, and another on march 25th...both came out negative. so should i be expecting my period to come sometime soon or what? i've never taken plan b before so im not sure how this works to well.