I agree with Cindy,,,it doesnt mean u cant acquire an std with ur first sex encounter... however, you can try to check yourself for other signs and symptoms like, cheesy vaginal discharges, itchiness around the vulva, you might have a yeast infection... but the best that u can do is seek for a gynecological help so that treatment and healing can be achieve. Good luck n God bless
just because it was both yall first time does not mean it cant be a std. could be a std or yeast infection. you need to go get it check. gynos are not bad, lol. if its something serious it could cause magor prob in the long run