:D preggy hellpp?

i had an protection with my bf! my last period was 31 march and end april 6 and had 1 week with my boyfriend without any proction. then april 16 i had agian without any proction and he came all the time inside me! and my back hurt but im not felling want to throw up or anything. but my back hurt lower back realy hurt im a pregnant? or just a sign? well if im i have to keep it. but if not theres always next year!