Am I over reacting????(LONG BUT PLZ READ)

Darrah
Okay so my older brother (21) and I (18) got into an argument about a month ago, it was literally over 10 dollars, but since I've been really bitchy I told him he wasn't getting the money I owed him because he is so rude in general and ungrateful so I just went off on him!! Last year I had a miscarriage which was really a bad time for me and I'm now 26 weeks healthy with a baby girl! But anyways we were arguing and fighting for a good 30 minutes and he told me he hopes I have another miscarriage or that my baby comes out unhealthy and has a bunch of problems.. and that hurt me so bad and I lost it on him !! And haven't talked to him since and my mom says he wants to apologize and blah blah blah and that I need to make up with him and I'm like no??? You don't say that kind of shit and just say sorry ?? Like I don't want to speak to him because that really hurt me what he said and it was sick for him to say something that low. I just don't know what to do, I will never forgive him. But that's just me .. any advice ?