Exactly the same thing happened to me. Prior to the purchase I had been doing a bit of web searches -- first for the family of products I was looking for (i.e. not a specific brand) and based on what I read I decided to learn more about one product specifically. Confident about its quality after having read a lot of reviews, I bought it shortly after I had began looking. Several days later I began seeing ads for the product and they kept targeting me for quite a while since then.
When I need something, I will generally research intensely and make a decision in short time. Sometimes the decision will be to not buy, sometimes to buy later and at other times to buy right away.
When I decide to buy later, ads are useful to remind me or to offer competing products which come out in the meantime since when I'd done my research.
Ads about something I decided I didn't want are mostly annoying.
Ads about something I have are always annoying. The only kind of ads which are worse are those for things which are so irrelevant that I've never even considered them.
You'll end up clicking more than 3-5.
I've been using a computer without adbock for the first time this week in the last 6 or something years that I've been using adblock. I've clicked on a lot of ads, they're too relevant. Curiously, I'm getting a lot of ads for products that I've already bought.... and I end up clicking on them to find out more info. They're just too relevant, they'll be about the thing you were thinking about just the other day -- you'll click them.