I had sex 4 nights ago, he had a condom on and pulled out before he came, the night after i had a bad prawn and 2 that morning i was sick and was vomiting, the past week i have been very exhausted and than had sex so was even more exhausted, i have a very sore stomach that has kinda bloated, am nausous, head aches, and my thighs are sore, could i be pregnant or is it just my body fighting food poison and since i was so exhausted its just weak, am i oregnant or nit i has only been 5 days