Unless you are gifted genetically or are very experienced a recomp is not a good idea. Your best chance at success is to pick either a cutting or bulking cycle. Benadryl doesn't down regulate ?2 receptors. You need 1 mg of ketotifen daily for that effect. When you use clen and keto at the same time there is no need to take time off. I'm going to assume you meant 25 µg of T3 not 25 mg. As that dose would likely cause death. The body produces about 25 µg of T3 per day. It makes no sense to shut your thyroid down for the same amount you produce naturally. One should start off with 50-60 µg/ day of T3. The catabolic effect T3 has on muscle can be minimized by using 250-300 mg/week of test. Personally I wouldn't use clen and T3 at the same time due to increased side effects. HGH for only 5 months seems like a waste of money. It needs to be used for a long time to see results. No one can tell you definitively what will happen to your hairline on cycle. As this is completely genetic. If you are going to commit to running a cycle then you need to accept that you may lose some hair. I take 0.5 mg/day of dutasteride and experience thinning hair on cycle.
T3: A complete guide to cycling T3 and how it works