Nervous!!

Megan • 24, have a 6 year old girl and an amazing boyfriend! Expecting #2 November of 2015!!
I had a miscarriage in jan. I'm trying not to get my hopes up after figuring out I have a positive test...I have some pregnancy symptoms but not sore breasts like I've had with my daughter or before I had this MC. Should I wait..or let my dr know...not sure what to do, I don't want to lose this baby