4 weeks ago i had a biopsy done on a thyroid nodule which came back clear but i feel poorly, with symptoms of thyroid problems could it have changed?

Need for evaluation: It is not clear what symptoms you have and what your thyroid related hormone levels are. Without this information is it not feasible to provide a useful suggestion. It would be prudent to see your doctor as there is no need for you endure these symptoms.

Thyroid nodule: Usually don't cause symptoms unless large and pushing on nearby structures. Was your thyroid level checked and if so was it normal. If not checked it is a simple blood test so discuss with your doctor.