Hi I recently had sex for the first time about a week ago. My vagina didn't hurt right after, but now about 6 days later it is swollen and very sensitive. My breasts hurt. I have fatigue and I felt nauseous this morning. Do I need to take a pregnancy test and is it to early? I am 24 years old, weight is about 153, 5'5" , and have had a history with thyroid problems, and very irregular periods.