Is there a chance of having persistent back muscle pain from running?

Hi doctor,

I ran 10 kilometers and when I arrived home, I had terrible back muscle pain. Next two days, I was better. So, I ran for another 10 kilometers but, this time when I arrived home, it was even worse. There was a shoulder pain, and dorsal muscle back pain when I was walking. Then, it was very hard for me to move, to walk more than one km, and I felt very tired after some walking. Also, when I take a deep breath, I could feel my back muscles in pain. There was a slight muscle pain on the right side of the back at a specific point on the middle side near the spine. I did MRI, chest X-ray, cardio-echography, ENG, and EMG test, and also did a series of blood tests for rare infections and viruses. They found a sign of an unknown infection. The leucocyte level was high and after a few days, it became normalized. I also saw a neurologist and he told me that everything is fine from his point of view. In MRI, there were minor changes on the dorsal side of the back, but there was no nerve damage or joint damage. The immunological test and the other results also came negative. This happened two months back and still, I feel weak and have muscle pain in my back, especially when I am doing slight activities. Is there any chance to have persistent muscle back pain from running? I am taking Magnesium, Calcium, Cerebinox, and Propanolol tablets. I had no issues like this before.

Hello doctor,

Vitamin D and TSH are at normal levels. I have days when I feel better but today, the pain is the worst. I hope that this is not a case of fibromyalgia or other severe issues.