Am I overreacting?

My boyfriend and I argued over him suddenly leaving to go get gas money from his brother across the city, so I had a bit of an attitude when he came back I didn't feel like talking. His response was "fine, be that way with your unstable, hormonal ass." (I'm 28 weeks) When he said that, he really hurt my feelings. I understand that being pregnant brings on hormones and emotions but what he said was uncalled for and it made me cry. Should I even be this upset?