I had sex for the first time about 2 weeks ago I was on my period we used a condom but it wasn’t on properly when he pulled out it fell off it was only on the tip since then I’ve been getting shooting stabbing pains in my stomach and I’ve been feeling really tired I took a pregnancy test about a week and a half after and it came back negative could it have been to soon to check I’m only 17 and hoping I’m not pregnant please help