Medication and weight panic

Ok I've been spiralling but slowly, for about half a year. Now it turns out my contraceptives and my aura migraines put me at risk for stroke so I need to change contraceptives and start taking betablockers ... That makes you gain weight. I'm trying to hold on to what little I got here but please please help me see sense here. I'm so scared of taking a medication that will let my ED go all in. I'm scared I'll start restricting in pure panic - I've had a month with good eating and was starting to feel a bit more safe. I'm not in a space where I can talk to my doctor yet, even though I know I should. I don't know where to turn. I just need some empathy to get past this and land in understanding it being necessary. Help.