Im i pregnant?

I think im so pregnant ! I dont take a test yet but im so freaking sick all this morning sickness are killing me also yesterday i throw out all my breakfast and im barely eating, i lost weight i dont want to be pregnant we have sex when i was finishing my period and he came on me also after my ovulations days but if im.pregnant i think was the one with my period but im regular. So my boyfriend dont want babys yet we even talk about that and since i few days i feel all this vertigo, nauseas, etc... Do you think im pregnant?