proviron mesterolona pct help

i am curently in my 3rd week of a 12 week cycle of test c 250mg 2 times per week & week 1-4 40mg each day & week 5-12 oral masterdrol. i have nolvadex & clomid for pct i am currently getting acne sides not bad but man they are big i asked my sorce for a good acne medication & he came back with proviron mesterolona 25mg tabs i had never herd of it so i looked it up & as far as i can tell it actualy causes acne not help it but i think it can be good for pct ??? now the ? what is it actualy used for & is it something that i can use. ? as far as my pct what doseage should i be using for the nolvadex, clomid & proviron if it is good for pct i am 5 ft 5in & a lean 158#& hoping to be around 185# at the end of my cycle i also have conflicting answers on when i should start my pct most are saying 2 weeks after last injection & others 2 weeks before my last injection NOTE:this is my first aas cycle ever at 38 years old thanks in advance for the help