Welcome !
Well why do a PCT ?
After a cycle your body is producing less Test than a 9 year old girl.
The cons of not running a PCT is basically that you could potentially strip away some of your hard earned muscles, you could feel moods swings, crashing feeling, lack of strengh..etc.
THE Hyphalamic-Pituitary-Testicular-Axis
(HPTA) for short is the thermostast of your body's Natural Production of Testosterone..
A natural recovery of the HPTA after a cycle is a very slow process..could take up to a year...
This is why you would benefit from post cycle therapy (pct), so you can Balance your HPTA faster.
IMO Nolvadex after running your cycle at 20MG
a day should work for you /Clomid takes too much more to do the same thing, you would prolly need to take 150 mgs a day.