I am 19 years old and for the past 2-3 weeks my breasts have been very tender. Within the past week I have noticed some swelling also. I am on birthcontrol pills and have been since I was 16. I have an active sex life with my boyfriend and we don't always use condoms...I know not a smart thing but some things happen... I have not missed a period, it is due next week. I'm not sure if the pain and swelling could be pregnancy or something else...