i havent had my period yet this month, i did have protected sex with my boyfriend earlier this month on the 5th, our condom broke. recently i have been experiencing some nausea, breasts are swollen and sore, very tired, disoriented at time, my body heat goes up, and i feel really down and just not my normal self. Is it possible i can still have my period and it go into the next month or is there a chance i may be pregnant?