can you ask ur boyfriend to talk to ur mother in person?

I think, he should be the right person to fix this mess.
Ask him to be very kind and flood ur mother with kindness and compassion. make sure he shouldn't loose his temper while speaking with her. She may understand (It happened to my friend. Her mother convinced only when the boy met her in person and explained how much he loves her).

abt ur problem, u should concentrate on ur health. don't skip meals. it's better if u avoid pills to sleep. it's all coz u r worrying too much.