Yes it was horrible. Almost like a dead animal smell
It goes away
Best to check in with your doctor about this. An odor can indicate an infection. Good luck
Are you changing the pads regularly even though you're not bleeding? Pads aren't breathable so you sweat and that can lead to unpleasant smells. This is my guess. Stop wearing the pads, try pantry liners or panty shields instead of pads. Wash using an un perfumed soap and never douche. Don't wear underwear at night so that you get some air round there.
Unless you have other symptoms like fever or pain, that will mean probable infection and will need checking out.