Implantation bleeding and cramping?

The hubby and I have been trying since december, so Sunday I assume I got my period. I had bad cramps on the first day which is not unnormal for me but not regularly. I bled regularly the sunday/monday, and continue to spot till Friday. but since Thursday afternoon I have been having constant waves of nausea coming on, which have been waking me up Thursday Friday and this Saturday morning. No one else in my house is feeling it, so we know it's not my cooking Lol. Could this have been implantation bleeding and cramping? Or am I getting a weird stomach flu? I never been pregnant before, and these cramps were pretty intense, not light at all. What are your thoughts?