Implantation bleeding or just desperate?

Sandra
My husband and I have been having unprotected sex for about two weeks now. Today I experienced a little bit of bleeding but my period isn't supposed to start until next week. I've never experienced spotting between periods before. I've also been feeling suddenly hot and nauseous tonight. Is it too early to know? Too early for morning sickness? When can I take a test? Am I just desperate to be preggo? :)