this is the number one thing u need. sometimes cushions hurt more than they help by bending your mid section and they’re uncomfortable AF, but you can get a whole body slanted mattress (this is what i have) it’s called AVANA on amazon. it’s an investment and totally worth it! i it got me off my meds (i also eat healthyish and stop eating 4-5 hours before bed) good luck!!!

EDIT: Avana Mattress Elevator - Under Bed 7-Inch Incline Foam Support, Queen https://www.amazon.com/dp/B077KHHG7K/ref=cm_sw_r_cp_api_i_pSotFbRBKDWPF

You can try something like this.