Pregnancy Info HOME

I am 20 yrs. old and the past 3 months i have had a regular period but this month I'm 3-4 days late i took a test but it came out negative.. im concerned because ive been having cramps the past week which is really strange for me because i don't usually even get cramps and also my br___t have been tender and sore for about a week also and i sometimes do get tender br___ts a week or so before i get my period so my body is acting wierd.. i havent done anything different to have delayed my period and i have had unprotected s_x about five times last month, so what are the chances i'm pregnant?