5 days late. Is it too soon to test?

I'm 21 years old & have experienced 2 miscarriages. My boyfriend and i have been ttc since September. Our last miscarriage was at the beginning of August. I'm praying I'm pregnant and that this will be our miracle baby. My breasts are super sore, even my nipples. I have never experienced sore nipples before. I've had some headaches and if I don't eat every little while I feel nauseated.