I need help!!

I was supposed to have my period this month on the 21 but didn't get it I'm really late today it's the 27th and still didn't get it I feel like I'm about to get my period my boobs hurts and it feels sore I've been having sex every week this month and now I'm just scared cause I rally want a baby with my boyfriend but im scared to check cause I don't want it to be negative.. But my period been late before but not like this help!!