It was a pretty stressful evening, coincidences made me see that a company, Rebtel, posted usage of my card in the online bank, seven times today.
I think it's
through Amazon Prime because that's what I saw something strange from yesterday, I don't have anything I subscribe to from them. But today the first one changed to Rebtel and then 7 more.
Called the bank and blocked the card, had to fill out a form online afterwards, then I had to fill out an online form to the police after that. The bank requires a police report in case of fraud.
The good thing is that it wasn't more than $100, and that I saw it so quickly, because I usually don't check my bank account more than 3-4 times a month.
I tend to be very careful when buying, never click on stupid links, but not all stores are bulletproof, those that require online banking authorization I consider safe, the others are where I guess the card went astray.
My lesson is to not use my main card for online purchases, better to move money upfront.