Sleeping with a pad

Ok so I’ve tried to put a tampon in many times and it just doesn’t work for me. I’ve done lubricant, tried different angles, different tampons, etc. so I’m stuck with pads. Well last night I woke up twice bc the pad was full and it my back bottom area had blood on the underwear too- I guess when I’m sleeping the pad doesn’t cover that part... what do I do? I’d like to sleep with a tampon but i know you aren’t supposed to and I can’t get it in anyways and pass just don’t work for me while I sleep?!?!?????