While I do not condone seeking or trying to give medical advice over the internet or making diagnosis.
Based off of my personal experiance with the drug and my medical background I do urge you to get some blood work done and discuss these concerns with a physician.
I suffered profound weakness on this medication and over all lethargy and muscle degeneration, despite docyors routinely prescribing this medication widely I do not feel they follow their patients close enough nor do they adequately discuss the potential for serious side effects.
I do not whish to alram you and if I have I apologize but even the minor symptoms you described can be an indicator that something is wrong and especially need to be checked if you are on medication.
For me this medication was serious bad news Everything is reversed and I am more than fine now. Just as the side effects progressed as long as I was on the medication they improved day to day as time past once I cleaned up my diet and stopped the meds.
I wish you the best of luck.