Struggling to fall asleep

Hello! I’ve been on my meds (IR) for quite some time now and while it makes me productive during the day, I can’t for the life of me get more than 4 hours of sleep each night no matter what I try. Lately I’ve been taking the calm melatonin every night but it doesn’t work like it used to. I’m wondering if anyone has any suggestions or advice on how to get better sleep? I’ve become a crabby person in the mornings now when I used to be a morning person. Between my mind opening 100+ tabs in my brain the moment my head hits the pillow and the meds, sleep continues to evade me.