I feel like I'm losing my mind!

My partner and I had a miscarriage in feb/March and for the past 2 weeks I've been throwing up, feeling nauseous, my stomachs getting hard (even after I use my bowels it's hard) and my boobs have been sore as all hell! sorry for the tmi haha and today it looked like my boobs had been leaking though could have just been dry skin so me being me I squeezed them and it looked like the little pores that the milk comes out of was opening up but no liquid came out. Am I losing my mind or should I test for a pregnancy?  We've been so careful and I haven't missed a period since the misscarriage :/