What Causes Nausea After Having Weight Gain Supplements?

Hi, I don t have a good appetite, in July 2011 I was diagnosed stomach TB and I took medicine for 18 months so I stopped in jan 2013...... Then I went to homeopathic Doctor as I was struggling to recover due to medications of TB....doctor said you are in Depression and I felt fine after his course, I am still on himeopathic course...in 2015 also.. after that I started doing gym....I took creatine and some protein but protein does not suit me either....after taking creatine for sometime, I had some pain in my back.....I went for ultrasound and small very small minute stones were there.....but when I stopped taking creatine they were washed out.... I also take testostweone undeconate via injections for 2-3 months because was unable to put in weight. I lost every weight I put on during supplements..... I am again skinny.....whenever I take weight gainer supplements.....I feel nauseous and don t want to eat anything and my eyes get heavy.....I have no good appetite as well..... PLEASE HELP ME :(