I'm not sure if the 6-oxo was enough for you last cycle. You might want to get some bloodwork done to make sure. I would look into some SERMs, you can google to find them. Toremifene is probably the best choice, Nolvadex and Clomid are also good options. This is gray market/not perfectly legal.
Or you can go over-the-counter route with something like the Invalid Link Removed, stacked with/or Invalid Link Removed, DTH, T-911 etc. or some other test booster plus an AI, . Search for Post Cycle Therapy and do some reading.