My advice to you is to go into the New To Steroids section here and educate yourself on the basics. Test prop should be run EOD. Running it every 4th day will not only negatively impact your gains, but it will de-stabalize your hormone levels which is a big problem.
Although you weren't specific, if you've run "many" cycles when you were younger without running any PCT (I'm also assuming you've never used a cycle support supplement nor a liver protectant while running orals; orals create a toxic environment in the liver) then there is a good chance that your endocrine system isn't in great shape.
Go back in time and fix all this or go get a blood test and see where your hormone levels are at now. Probably meet with an endocrinologist if they're as fucked up as they could be. If you're off everything then you need to start a PCT with Nolvadex and Clomid to try to restore your natural test levels.
What kind of cycles were you running when you were younger? How old were you? What compounds? Dosages? Length of cycle? How often? The more information you can give to the guys on here the better they can advise you.