Since you are playing DR with your self, it's important to understand how the PCT is doing it's thing.
There is a section here on Meso call steroid articles, read up on everything you can about SERMs and PCT.
You should also read up on some of the steroid stories of other 20 year olds. They often dont have happy endings. Sometimes it takes a really long time for your hormones to recover to your natty levels. There have been a lot of guys that looked great, were surrounded by loads of hot college girls that were horny as hell, and had no libido at all.
Think about how you will handle a situation like that, take home a hotty.... but cant get your dick hard.
At 20 your endocrine system is still developing and your natty test is the best it will ever be. You can really fuck things up with even a simple cycle. It's a calculated risk.... You decide if its worth it for you.
And wait 3 weeks after last pin to start PCT.