I have a very irregular period but I had sex like ard the 3rd of July he finished inside of me... I haven't gotten my period and lately I've been feeling really light headed like everyday to the point where I get  grossed out and throw up. Before the light head I was was craving things. I think it's all in my head but I've been getting bigger like my hips and I'm super bloated I get cramps n I keep thinking my period is coming and it's still not here I should of gotten my period the first of this month n nothing. Could I be pregnant or is it just in my head?