The yellowing of your eyes and/or skin along with dark urine suggests elevated liver values. The degree of damage can only be assesed with blood work. This should not have occured if you used the proper liver protectants during your cycle. In specific, I am referring to a combination of Tyler's Liver Detox and ALA/R-ALA.
PCT should begin one week after you last injection.
1000 IU's HCG 3x/wk in combination with 20 mgs Nolvadex ED for a total of 3 weeks. Discontinue HCG and continue with 20 mgs Nolvadex ED for and additional 2-3 weeks followed by blood work to evaluate your recovery.
I don't feel that clenbuterol has any drastic muscle sparing effects. Post cycle muscle retention is attributed to a proper PCT protocol and an adjustment in both your training and nutrition. The consistency of your training and nutrion program are the keys to long term progress and results.
If you do not have a doctor that is familiar, I would recommend consulting with DrJMW. There is a thread in this forum entitled "Blood Testing." This is what you are looking for in particular.
Jenetic