pregnancy symptoms??

Karamela

these few days i've been having headaches, burping but not throwing up,and having a lot of gases also i have a stomachacache i dont know whats going on because ive had my period last month and didnt have a sexual intercourse after but had sex before my period as i read that its not possible being pregnant if you have you period and my next period doesent come in 14-15 days max what do you think guys?also ive been very sleepy.