I had sex a few days after ending my period a week ago on Friday night, the condom broke before my boyfriend ejaculated but to be safe I took Plan B the next morning on Saturday. I had no side effects the day I took Plan B. I started my period again Tuesday or Wednesday and I have been having really painful cramps and on/off heavier bleeding than my normal period. My normal period is usually irregular and comes late. For the past 6 months or so it has become more regular than in the past. My question is should I worry about getting my period so early again after my last period and it being heavier with painful cramps?