Rexulti weight gain

Hi! I've been on lexapro for about 2 years (20mg) for GAD and it worked perfectly up until 6 months ish ago. My dr just prescribed Rexulti 0,5mg in combo to lexapro but I'm very scared of the side effects, weight gain in particular.

I've never had any side effects on lexapro and usually don't have any side effects from medication.

When I asked my doctor, he told me only 2% of patient reported weight gain but it seems as if it's way more common.

Anyone has this combo of medication and have a positive experience? No side effects or tolerable ones and as it help with your anxiety?