ive been taking amitriptyline 200mg per day for quite a couple of years for my obsessive compulsive disorder.recently i bought phentermine 37.5mg illegally from online pharmacy(im 65kg with 158cm in height).im now having breathing difficulties and my heart rate is irregular.almost constantly 115-120 beats per minute.i went back to my doctor to get help but i dint mentioned im taking phentermine because im scare he and my parents will scold me.so, he gave me xanax 0.5mg to be taken 4 times per day(sum 2mg) because he really thought it is anxiety and im kind of having my OCD relapse.will these problem go by in days later?