Me and my girlfriend wanted to have sex. she was on her period. for some reason, it was hard to penetrate her, and i kept forcing. the condom was also tight. now i have pain in my groin area going to the bottom of the shaft,did i break something?

No: It may be from rubbing your pubes together. You may use water based jelly, e.g., K-Y Jelly, as lubricant. Use contraceptiv all the time, every time. Have a healthy diet, exercise 30 minutes/day, drink plenty of water, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Get HPV vaccine. Wish you good health!