early signs of pregnancy??

Okay so my boyfriend and I have been together for a while now. he says he's "potent" so he can easily get pregnant. his ex wife has had 4 children and she got easily pregnant. I have problems getting pregnant because my doctor told me. But I already had one child. But now we had unprotected sex and for the last two times he came in me. I feel super bloated and my ovaries (?) are all tense... can that be a sign??? I know i want more kids but I dont think I can handle it now. I do want one kid with him and he's super supportive of everything but could I be pregnant? what was your first few signs? I'm only two days late.