Why Have I Been Experiencing Sudden Fatigue After A Bowel Movement Apart From Groin Pain And Arthritis?

Question : I've been experiencing sudden fatigue crashes after a bowel movement, and am also suffering from groin pain and arthritis. Hip replacement is being considered; Dr. Gainor said better now than later. I'm almost 76 and my Sansum's Clinic internist has been prescribing a minimum dosage Levothyrotxine since I went through a difficult menopause at age 51 and had incapacitating headaches. All seemed well except I had a bicycle accident with a knee injury that led to extreme pain and never really cleared up. I wear knee supports daily. My internist had blood tests taken and said I was hypothyroid. He was going to prescribe a higher dosage of my drug until he asked if I took my medication with my supplments; none of which contained calcium. He decided I should take my thyroid medication an hour before the supplements and eating breakfast. I drank an ice cold smoothie and started shaking, plus experienced sudden exhaustion about 2 weeks ago. I went to Urgent Care and they said I was fine. Today was the final straw. After about 11 hours of sleep (having taken my thyroid medication at 3 a.m. to make sure it wouldn't interact with my supplments), I had a half a cup of coffee with milk and essentially never woke up. I couldn't do my hip/groin exercises, but I did feel better after one of my international students visited me and I managed to get out and walk a few blocks. I'm the author of NEVER MARRY IN MOROCCO and a few other literary attempts. I have started doing stand up semi-professionally and am scheduled to be on stage on Thursday. I am known for my sense of humor, but it ran out today for the most part. I plan to call my internist and ask to have another TSH blood test done although he wanted me to wait 2 months and it hasn't been a full 2 months. I feel like this is putting me through more than a woman of my age can take.