Hi I'm 17 I have been on the injection 2 years I came off it 6months ago, I've been having unprotected sex with my boyfriend and I took a test 2 days ago which came back positive, I then took 3 more which came negative, the next morning on my first wee I took another and this again was negative on my second wee I took another and that was positive again, and today each one I've took have all been negative, I've been get loads of pain in my lower stomach, am I pregnant?