Fever and irritability. Postcovid sign?

Hi, my baby is 4 days shy of 8 months. Since yesterday morning he is having fever below 101F . I gave him pacimol drops and fever subsided but after every 5-6 hrs fever again appears . Also his head his very warm throughout even after fever subsides. He is also very irritable, having loose motions 3 times since yesterday, pulling his ear continuously and taking everything in this mouth. He is not ready to eat solids as well and only breastfeeding, i tried giving him potato , banana, cerelac but he spits it out and even regurgitated once. I talked with his paed but he told me to give azithromycin drops and pcm drops. But i am not sure should i give him antibiotic. He had the same symptoms 1 month back also and his paed give him Taxim O drops and pcm drops and he recovered. 2 months back my baby and whole family recovered from covid.I think all these are teething symptoms but i don't see any swelling in gums or any tooth.What should i do.Are these postcovid sign?please help,worried mom.