Silly question from a FTM for non-FTM's

At 35 weeks, I'm feeling like a whale. The pressure isn't too bad yet but just feeling huge... I know it will probably be a few weeks after birth before I can wear non-maternity clothes but how soon after giving birth do you feel "lighter?" Like is it immediate or does it take a while and you just kinda feel super bloated? Lol... Very weird question but I am so looking forward to the day I don't feel like an elephant anymore