Do you think I replace my pad to often?

Alright so my period before has been super light to the point where I hardly needed a panty liner, now all of the sudden my flow got HELLA HEAVY and I had to go out and buy hefty overnight pads because holy crap. I replace it every hour or hour and a half because that's when it starts to feel wet and just generally nasty. When I take the pad off I see that inane spots it soaked all the way up to the waterproof lining at the bottom. So do I just have a heavy flow or ami just to picky about putting on a new pad (I've gone through 6 pads since noon and it's 10 o'clock)