help so confused.

Sommer
I'm suppose to get my period today. I had light blood mixed in with discharge the other day and a little today. I am now throwing up repeadtly this morning. Could I be pregnant or is this just my period starting? I never throw up before a period. I've had a baby already but my cycle was so messed up when I got pregnant that I don't remember any of the first signs before I found out I was pregnant. Last months period was lighter than normal as well. Please help!