You can run PCT again, if it did not work properly, or effectively enough the first time....
Better than Clomid, would be HCG in low doses, which would also require Nolvadex if you are going to do it properly. If you want your levels back and don't plan to cycle again, why not run say a 2 week cycle of HCG with Clomid and Nolva for 1-2 months in unison??
If you plan to cycle again, then you are wasting your time. If your natural HPTA is not back to normal, you might as well start sooner than later, otherwise the lack of testosterone is just going to cause you to lose muscle, and then you are going to have to play catch up in the long run. Next time, be sure your levels are back to normal after PCT with some blood work, and consider it lesson learned.
Remember that natural HPTA levels can take anywhere from 6months + to return...with some gear much longer, without the help of ancillaries. This source information comes directly from endroconology doctors, and it is well known to be factual.
Also, the "General Rule of thumb" is that however long you cycle for...you should take at least that amount of time off before doing another cycle, though in reality, if you were running 8-12 week cycles, your body would never be able to naturally readjust HPTA levels. On account of this, it could be a good idea to run HCG in the middle of a cycle, and while it is more and more common nowadays to run HCG the entire time during a cycle, lest not forget the added estrogen and prolactin that HCG causes, which would require Nolva to be run the entire time as well. No real scientific way to be 100% though if you run your cycle right, you can get pretty damn close.
Hope this helps...