pregnancy fake?

Has anyone here ever tricked their body into thinking they were pregnant?? 
I have had like 10 pregnancy tests over 4 months and they have all been negative and nothing has showed up on any scan I have had. 
I have low abdominal pain, feels like I have period pain CONSTANTLY, I feel pressure in my lower stomach and it hurts when I put pressure on the middle of my stomach (just under my belly button) I can even feel my Paulse in my stomach. please help! 
I'm on the pill and my partner also uses condoms. I'm still get periods as well. Why do I feel like I'm pregnant. I think I'm stressing myself out.