Can I eat too much fish and chicken whilst on protein shakes help me build up my muscle?

Consider nutritionst. You may want to see a nutritionist. Although there are exceptions, it is very unlikely that you will take too much protein while body building. However, if you do have kidney problems, it is possible that ecessive protein intake could cause a problem. Certain proteins may be more benefical than others with many favoring whey protein supplements. However balance and moderation is always reasonable.