I missed my last depo shot by only a few days and i've been on it for about 9 months. And I know smoking is bad for me, i've heard it a million times and i'm trying to quit, so no comments on that, please. I've been smoking for 3 years and never gagged or thrown up, but lately after every ciggarette i smoke at least makes me gag or vomit. My husband and I had sex in the few days after the the missed shot. I'm also expirencing a few other symptoms that aren't completely normal for me. Could I be pregnant?