I (f19) recently got diagnosed with bipolar and it has been a tremendous weight off my shoulders to finally know wtf is wrong with me despite nearly everyone around me suspecting it for years. My GP and psych are intending to prescribe me with Olanzapine as a mood stabiliser and a side effect is weight gain. Put simply, I would rather swallow a bag of nails than gain weight, especially recovering from an ED a year ago. There are 2 or 3 other options and they all include gaining weight. 

My GP is quite dismissive of me and didn’t believe me when I came i asking to be tested for bipolar, so when I told him I’d rather die than gain weight, he didn’t care either. My parents also just say I can lose the weight if I gain but that literally involves GAINING weight and I can’t fathom it. I know it’s a vain thing to think about when it’s helping me but right now it’s not in the best interests of me and would probably make me more depressed and potentially relapse.

I just need some advice on how to approach my GP and make him understand that I will not take medication that so many have gained weight on, as well as wanting some recommended medications that don’t make you gain weight. 

TIA, sincerely someone who is very stressed out ://

(I’m in Australia btw)