Heavy period??

I’m very new to Reddit but I can’t find much online about this so I hope I’m doing this right. I have a very irregular period that causes my periods to change flow rapidly. Right now I’m going through my pads in about an hour or 2 and it gets pretty expensive with what I use. The only product that has ever made me comfortable are the overnight disposable period underwear from the brand always. but they’re very similar to a diaper in my opinion and they get expensive. I’ve tried looking into reusable underwear but I’ve been kinda scared to try them. It’s never made a lot of sense to me how they work so I’m not sure if they would work well for someone that has super heavy periods at times. If they do work for heavy periods what brands would you recommend?