HELP ME PLEASE IM SO CONFUSED!!!!

Taya
I had two periods last month, and this month it came late and I took 4 pregnacy tests they all came negative, went to doctor they did a pregnacy test, came negative, and now I'm worried, my tummy is growing more. and I feel something moving, feel tired all day sleepy, I been having headache two weeks straight non stop. PLEASE HELP....... I am so confused,