Am I Pregnant? I Had Sex 12 Days Ago And

Am I pregnant? I had sex 12 days ago and took a pregnancy test 10 days ago but the test came out negative. When I have my had laying on my uterus I feel bubbles popping. I got nausea this morning but that was the first time. I cramp sometimes but there not horrible and most of the time my stomach just feels funny. But it doesn't feel like the normal period symptoms I get. I think I'm pregnant. But I keep second guessing my self cause everyone is saying I'm just stressed and I had a fail se pregnancy test. I still haven't gotten my period. And I'm almost posituve the week I had sec I was ovulating earlier in the week. Am I pregnant or just crazy please help