Hi there!
Well, without a clinical evaluation it would be difficult to determine the cause of your symptoms. Possibilities that may need to be considered include infections, inflammations, neuro-muscular issues, injuries, micronutrient deficiencies, hormonal/ endocrine imbalances etc. I would suggest getting this evaluated by a primary care physician or a rheumatologist for an accurate diagnosis and appropriate management.
Hope his is helpful.
Take care!