Your still young I'd suggest keeping it natural, last thing you need is to tool on your liver, or possibly kill your nuts or grow tits.
PP's line was mild but they did effect you, similar companies would be Andro Factory, AMS, or Forerunner if you must go that route. As far as I know even with the mildest of PH's it is always suggested to run a SERM after, which need to be illegally obtained due to the fact that they are prescription only medication mostly used for breast cancer.
You should look into an 8 week run of something like ArA, or DAA/Erase or one of the less intense natty's like APE or Bioforge. All which can produce results, as for packing on weight I don't get why everyone is so dead set on these clean bulks, or going the ph/aas route. I'm not saying it's mcdonalds and pizza city, but a caloric surplus is your best friend for weight gain, you can eat clean and get a caloric surplus. Sure your going to increase your BF% but if your looking to gain after your bulk recomp, if your competing cut.