my dom made me confess to grinding on the bed and told me as punishment I had to edge myself at least 3 times (If I edged 6 I get a reward) and I could only manage 2 as I couldn’t stand it. any tips on how to get to 6 or even 3/4?

I don’t know how you’d do three quarters of an edge but if you want to get to six then maybe wear multiple pairs of panties, or simply practise, a lot. It’s surprisingly hard work grinding on the bed, but exercise is good for the soul.