Please give me more details on your ailment. Also note that you are in the mahadasha of Jupiter and antardasha of Rahu. You are also running the period of Shani Sade satti. This is not a good period. Health issues will be there and therefore astrology remedies should be done along with doctors advice. If you are not fully convinced about the doctor who has recommended the transplant , it is better to seek 2nd or even 3rd opinion. I sure with proper medicines and astrological remedies you will be able to pass this difficult period easily.