Pregnant?

Hi mamas! So I have a 2 1/2 year old. I got my period two weeks ago and am not due for another two weeks. When I tell you I have cramping very low, boobs so heavy and full, exhaustion to the point where I can pass out at any given moment, dizzy/light headed and super bloated or full after I eat. Now I know it sounds crazy but ladies please please please help me out! Is it possible to feel pregnant this soon and just one week after sex? I thought I was coming down with something because my body hurt so bad! I went to my primary doctor for blood work but all was fine! Any opinions would make me happy! TIA!!!