So i'm not really experienced with the sex life and that's why i got some questions. this past saturday i was with my partner. he felt a difference, pulled out and noticed he didnt have the condom on anymore. this has never happend to me. he said it had to come down. after we were done, i checked myself and i was not able to find anything. i check a couple times after that and still nothing. today (Tues) while shopping i felt something dropping. so i went to the restroom and it was the condom!! i was scared. i have endometriosis and had some pain yesturday. is the pain caused by my endo or was it the condom?? is there a way this could affect my health?? could there be a chance im pregnant?? should i be worried about anything?? and how can i or my partner prevent this from happening??