Welcome to HCM
We understand your concerns
Your listed symptoms largely correspond to anemia
and somehow connected to weakness due to psychological impact of general diseases. First consult a general physician who gave the medicines for flu
and confirm these are not medicine after effects. Then your physician should investigate pathologically for any organic defect in your system. He might prescribe you some medicines and multivitamins for you. For the time being it is better to follow the instruction he gives you. But you need to go to a doctor to find the things. Am I correct. GO. and get well soon.