2mo peeing through diapers

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My 2 month old needs his diaper changed about ever 1 1/2 to 2 hours during the day. At night, he can sleep for about 6 hours now. But the past week he can go maybe 3 hours and wake up soaked. Diaper is huge and his pj's are wet. I've tried different brands, going up in size and now I'm trying to double up. He's a side sleeper so it's the area between his leg and diaper that gets wet. Like his pee has no where else to go because the diaper is so full. I'd love for him to be able to sleep normally again but I have no idea what else to do. So any suggestions are welcome. TIA