I wouldn't postpone the PCT. But as for the Forma, I'd start a week before PCT. That's what I do, anyways, unless it's a cycle I feel like I need to run it through cycle and PCT.. It has to get in your bloodstream, good. You won't notice any drying effects from it overnight, but after 4-7 days, yes. I don't know how long it takes to start working for sure, I've read a week, BUT I know if I ever feel any odd sensations from my nips on cycle and I start using Forma, they go away in around 3 days.
All in all, it won't hurt anything at all to start your Forma dosing today. It will be in your system good by the competition. As far as dosage, I don't know what to tell ya. I have never used over 5 pumps twice a day. I do know you can get estrogen rebound if you don't come off of it right. You want to taper off it it slowly IMO. But, wanting to be dry for competition... people might recommend the 10 pumps twice a day, but I'm not going to give any advice other than 5 pumps because that's all I have done, and I don't like guessing around with someone else's body.