Toxic mothers

How do other people deal with their toxic mothers? Especially while pregnant? She’s always fine one moment then blowing up the next and I just can’t handle the stress. The worst part is I put myself in this situation this time by thinking we could handle a mini vacation together. Instant regret. Now I’m stuck here with her for 24 more hours and I swear I’m about to lose my shit. Not only that but she has been terrible with my toddler. I can’t even just leave because it’s going to be 9 degrees and icy tonight. 🤦🏼‍♀️ please send good vibes my way.