I am new to mixing gear. I have had some PIP occasionally in the past running my TRT only (past 2 years). Since I have added Mast (after mixing with my Test) it is killing me. I am splitting them into 2. After injecting, there is no discomfort but the next day and especially the day after that, it serious pain. Because I am new to this I don't know if this is expected or if I have some bad Mast (which I don't want to continue with obviously). Please advise your experience and answers!!!

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