I am on Nuva Ring, and my period is a week and a half late. It's been a little erratic the past couple of months. I've been under a lot of stress. I took two pregnancy tests, and they were both negative. I have not had any other symptoms besides a little nausea this morning, but I did some drinking last night. Last week, when I was supposed to have my period but didn't (thus my Nuva Ring had been out for about 5 days) my boyfriend and I had sex. Is it possible that we conceived at this time? I know this isn't the normal time for a woman to ovulate, but my cycle has been pretty thrown off by stress lately. When is the soonest I can take a pregnancy test?