The only way to know is to test and see what antibodies you have. It certainly sounds possible, but no one can tell you that for sure.
I believe I've read that other things can also cause you to lose your sense of smell/taste, including colds, the flu, sinus infections and congestion, it's not just Covid. A medical guy in an article recently was asked about how to tell Covid from other things, especially if the Omicron variant turns out to produce only mild symptoms. His comment was that you would have a fever with Covid. I would take having had a fever plus loss of smell/taste as more suspicious than just loss of smell/taste. Covid coughs are dry and constant (at least at first), not those moist, croupy coughs you can get with congestion or colds. Finally, though they thought in the early days of Covid that there was a version of it that hit the GI tract, I haven't seen anything written in over a year that backs that up, so diarrhea wouldn't be suggestive of Covid.
If you haven't been vaccinated, you could get an antibody test to see if you have antibodies to Covid. That would not prove the incident you describe was Covid, but it would tell you if you have ever had it. I don't think the antibody test can tell antibodies caused by Covid from antibodies caused by the vaccine, so if you've gotten the shots you probably wouldn't get good information by taking an antibody test at this point.
I lost my sense of smell from a sinus infection. As stated, the only way to know if you had it is to get an antibody test
Covid symptoms are very similar to colds and flu, but what is fairly unique to it, is a loss of smell/taste.
You can have covid without losing smell/taste, but if you do have that symptom, it's more likely to be covid.