im 18 years old and i have missed my periods for almost 26 days up till now usually my period date is 1 i had them on 1 august i was expecting my next periods on 1 september but they dont i have mostly consitpation but in these days im having it more it feels like im about to throw up its all burning sensation in my stomach i am a virgin i never had sex before but on 6 sep my boyfriend ejaculated near my vagina so im afraid if i was pregnant because of my missed periods but i had them missed even before that please kindly help me