I would recommend using maternity pads, I thought the Mothercare ones were the best.
I had to use a shed load before LO was born as my waters broke early, they just don't stop coming once they've broken.
I also used the boots ones, they're OK but I preferred the Mothercare ones.
Why not buy maternity pads and thick sanitary towels and see how you get on. I didn't bleed too heavily afterwards but that's probably because I lost nearly a litre of blood during the birth.
They do keep checking your pads, honestly though, you won't be bothered at all. By that time, they'll have seen everything!