Does it sound like I'm pregnant?

I had sex with my SO last Friday night. I should've started my period 2 days ago. He did not pull out, because he wants a baby. I have had migraines, extreme fatigue, back aches and I have been eating a whole lot more than normal. I have abdominal cramps off and on, and severe heart burn.. I've never been pregnant before, and I don't know what it's like. Can you guys give me some opinions?