Normal cycle is 25days. took aftera last month, period came7/10.previous cycle began 6/13. period due few days ago but nothing.when should i get my period?? also took plan b 8/4 after sexon8/2( yes i know, but i thought period would come8/4)?

Plan B can upset the hormonal balance and affect your period. If it at three weeks after sex you do not get a period, do a home pregnancy test. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD.