There are a few free Bitcoin transaction accelerators online such as Btcnitro. Not sure about their effectiveness but they're free, so I don't see why not give it a shot. I've used them a couple of times and it does look like it confirms a little faster.
Most of them are just rebroadcasting your transaction, which is not gonna help when your fee is way too low. What you 'feel' is probably caused by a decrease in the transactions pool, and not related to those accelerators at all.
Help yourself by using RBF next time, and stop using custodial wallet or wallet where you can't set the RBF flags.