My understanding is that if you've had Covid and get the vaccine then it is no more harmful than if you never had Covid and take the vaccines. Here's the CDC's take on it. Frequently Asked Questions about COVID-19 Vaccination | CDC[^] I'm currently job hunting (in the US). My big fear was that I was going to have to prove I'd gotten my vaccination before I would be allowed to work for my next job. I have run the numbers given out by the CDC in the US against 2018 deaths as a control and came up with the opinion that the disease is quite deadly, counting as third leading cause of death in the US. Right behind Cancer and Heart disease but so much higher than the next category down that the deaths had to be from a new source.

US Numbers only
All numbers taken from 2018 as the control year except covid
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Heart Disease = 655,381
Cancer = 599,274
Covid = 336,802 <== where covid fits from 2020 as of Dec 31, 2020.
Accidents = 167,127
Chronic lower respiratory diseases = 159,486
Stroke = 147,810
Alzheimer's = 122,019
Diabetes = 84,946
Influenze, Pneumonia (the "flu") = 59,120
Nephritis (nephrotic syndrome, nephrosis) = 51,386
Intentional self-harm (suicide) = 48,344
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Source: CDC and https://covidtracking.com/data/national

You mention that you don't know if you've had the disease, but you know you were exposed. My opinion is that you treat that as if you didn't get the disease since not every exposure results in an infection. Then make your decision accordingly. My opinion is that the vaccine is the better choice but that's just an opinion. Both sides of this equation are filled with FUD. I didn't go through everyone's answer but the worry you didn't mention was the effectiveness against new strains of Covid. Here's a quick article on that. A Real-World Look at COVID-19 Vaccines Versus New Variants –

In all of that, I forgot the other compelling reason to consider getting the vaccine. One of the risks of Covid is that you won't die but you will get long-term effects. A friend of mine who got Covid and survived gets problems just walking to the end of her driveway and back. She now has breathing issues. My worry is the stories of brain fog and fatigue. For someone in the business of using their brain at a high rate over long periods of time (probably everyone on this site) this would seem to be a factor they should add to their decision-making. COVID ‘Long Haulers’: Long-Term Effects of COVID-19 | Johns Hopkins Medicine[^] Good luck with your decision.