Slipping help

Lisa
Feeling a bit devastated i can feel myself slipping into a depression. I have a history of depression (have been on anti dep on and off for 8 yrs, currently 10mg citalopram) but didnt get pnd early on thank god, just a bit of anxiety about leaving baby. we have had a tough year. My mom died in april, then her brother (my uncle) in november, my hubby lost job last month (has a new one thankfully but significantly less £ so things have been a struggle) abd last week my mother in law was diagnosed with stage 3 breast cancer. My little girl is 5 months old and up until last week was ebf but now started solids. Inreally feel i need a break, ive been with her basically 24/7 apart from 8 wks ago when mil had her when  we webt out for hubbys bday. I finally feel i can leave her for few hrsas since started solids she has spaced her feeds out to 3 hrly. Told hubby id like to go out for couple hours and he refuses to have her?! Said i need to ask his mom (shes aboutbto start chemo how can i do that) he said he doesnt like having her on own as she doesnt settle. He holds her at home a lot and lets me pop to shop for half hour but said he cant any longer than that. I feel so trapped. No one else to watch her and i just need a break :( ive tried to build up time he has her but he just wont watch her any longer than  30 mins. Hands her back when unsettled. What can i do? He will neva get confidence if he doesnt just do it? Help!