My wife had a blood test for covid antibodies and it showed that she had covid. she lost her smell for three weeks back in march. does that mean that i would have got it as well? we never stayed away from each other in that time?

COVID 19 testing: No. you don't have to get tested. If you were positive - it sounds like you were asymptomatic. All testing would do at this point is to help determined if you previously were infected.

Antibody test: You are likely to have been infected, likely asymptomatic infection. You could get a Covid-19 antibody test to know, if you must. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/. Wish you good health!