Yours antibodies is showing that yours immunity is good. Dont worry for reinfection.wearing mask,  keep distance socially, frequent hand wash follow You start doing warm saline gargle twice per day. Or betadine gargle.

There is possibility of reinfection, but no need to worry your body already developed neutralizing antibody that will last long for maximum 3 months. So if you are reinfected you are on your recovery, but there is also possibility of some throat infections too which causing you your symptoms. Consult for your clarification & do take warm fluids for fast recovery & maintain healthy diet, avoid sleeping with cooler oon or ac oon, it will worsen your condition.