Really, just give it time. It sounds like you’re doing great and it’s much better to go with it and feel it all build up than try to push too hard and either go over and cum or just burn yourself out.
Lots of denial sluts do more than 3 edges a day, it’s just about time. So if you can, you can add a couple of extras in.
In terms of adding sensitivity, pulling your panties up into you all day or wearing a crotch rope is awesome. Going pantyless in a tight pair of jeans works too – just make sure it’s not one that’ll show possible wet spots.
But mostly, just keep going, keep having fun, feel it build. Denial is a marathon, not a sprint, you’ll get there and it’ll be all the better for letting it build up over time.
Orgasm Denial – Slow roasted so extra juicy