MIL didn’t react the way I excepted at all

So yesterday my husband and I decided to tell his parents were expecting. I’m 5 weeks. His dad was quiet, calculating the due date and asking a couple questions. Now my MIL at first she said that’s great, asked me “are you ready for this?” but I could tell that was a lot for her to take in. I guess she just wasn’t expecting. She’s got other kids with grandkids. Anyways, then she was rude, or it’s just me who’s too sensitive. We started talking about delivery and epidural and all I said was “I don’t know I’m so scared of it” and she thought I said I didn’t want the epidural so she starts saying “no, don’t be stupid, don’t be stupid, don’t be stupid” like really? Did she have to be rude or am I just too sensitive.