Help please

Ok here's the deal

Me and my fiance have been trying to conceive. I have 1 daughter who's 5 and he has 2 boys already but we want one together. We've had false alarms already where my period was late and wasn't pregnant. But now my body has gone a step further.... past 2 weeks my boobs have been sore and producing milk... I squeeze and milk comes out,been tired and peeing like 9 times in the course of 20 mins! Up all night running to the bathroom... I feel super bloated and been having a lot of headaches lately. Should I test? I'm only 2 days late. I took a test on the day my period was due but came back negative.. I am also on antidepressants... could this be the meds or pregnancy?