Hi there, my name is Jamie and I am a pregnant paramedic. In reference to your worries, 2 days is NOT enough time to show symptoms of pregnancy. The pregnancy symptoms begin when the embryo implants itself onto the walls of the uterus. That takes 2 weeks at the least. Vaginal swelling and abdominal/side pain tell me that you and your bf are not having gentle sex. Vaginal swelling is a simple sign of inflammation due to friction, dryness, being too rough, etc. Other pains in the local area in the given time frame could be the changing of positions and being too rough. All the other symptoms are probably sparked by worries, the fact that you are in pain, soon to be period time, etc. You will not show signs of pregnancy 2 days after having sex. No worries there. Just be careful. Hope I could be of some help to you.