How can I help him understand my triggers???

As a child I would wake up in the middle of the night to my mother being go know where to be found for hours to sometimes days at a time . She wouldnt answer the phone and her friends would answer and they would be partying and wouldnt let me talk to my mom . When she would finally come home she would be on all sorts of drugs or shit faced drunk so I would have to take care of her they happened from the time I was 4-13 when I was put with a foster family . Today I fell asleep at 5pm cause I was in pain from endo , I woke up to my fiancé no where to be found . I installed started crying cause I felt abandoned just like when I was a kid . So I called him and he was at a friends house that I don’t like which made me angry on top of being triggered . I told him to come home and he kept telling me no and then he started bitching me out for being upset and mad that he left . This isn’t the first time this has happened . How to do I get him to understand that triggers me ??? All he has to do is wake me up before he leaves and tell me where his going , I’m seriously a wreck right now cause I feel abandoned