Husband tells his parents

My husband and I have an almost 5 month old and we got into an argument about how I seem to be doing all the work and having to get up with him everytime to feed him and then get up with the baby in the morning while my husband sleeps in. Anyways, it got pretty heated and I was so mad, I said some things I shouldn't have, so he left and went to his parents so both of us could cool off.

Later that afternoon, his mom starts texting me, saying that yeah he should be helping more, but most of the time the women takes care of the baby because men just don't really know what to do with babies and blah blah blah.

He went over to his parents and told them about our argument and who knows what else. And now I just feel awkward around them. I feel betrayed that he would tell them all our business. That's between us. Now I just feel like they look at me different.

Would you be mad? Am i overreacting? I was already aggravated and now his mom butts in on our relationship. Ughh so annoying