Hi mama! Yes, a few of us tried getting the antibody test after our vaccines, honestly it's just a simple blood test, walang mahirap dyan, kaya lang ang mahal ng out-of-pocket cost if hindi covered ng insurance mo. A friend of mine did it months after her second dose kasi curious din siya kung protected pa siya, and the clinic just gave her results after a few days showing kung gaano kalaki ang antibody levels niya. But if you're thinking of doing it to decide whether to get a booster or something, mas better mag-consult lang sa doctor mo para alam mo exactly kung anong test you need at kung necessary pa talaga, para hindi gastos lang. Stay safe, mama!