Pregnant after mc?

I had a miscarriage at 18wks in November. My husband and I have done nothing to prevent another pregnancy (he says whatever happens, happens)...well I had my last period the 12th - 15th of this month. 
Lately I've been SUPER moody, my boobs have gotten bigger, and I get nautious daily. 
I took a test yesterday and it was negative (thank god), but tbh it's too soon to tell bc my next period won't be till the 8th of February.
Could these symptoms just be from the toll of my miscarriage..or could I be pregnant?