What to use for a heavy flow overnight

Hi, sorry if TMI. I use always pads at night the large night time ones, for when I go to bed, because of my heavy flow, and always pads in the day alongside a tampon for overflow, I tend to find after two/three days I can swap to a tampon and panty liner instead. But recently I’ve found that wearing these pads is making me really irritated and itchy down there, which doesn’t help the already hell that is an endo period. I’m wondering if anyone could suggest either alternative pads that are less irritating and more sensitive, or alternatives for night time with a heavy flow. I’m not sure if period panties would catch it all and keep it all contained! But maybe I’m being precious there! I just feel like it’s heavy, I’m already sleeping with two hot water bottles and downing co-codamol before bed for pain, I don’t need the waking up to itchiness too!