Hello!
Logs are a useful tool that you can use here to find the servers you recently joined.
First, you need to find your Minecraft folder. You can find this by into your file explorer of choice, and going to the following path for your operating system:
Windows %appdata%/.minecraft
MacOS ~/Library/Application Support/Minecraft
Linux ~/.minecraft
Now, enter the folder logs, and open the latest.log file and search for Sending you to. You can see all the servers you went sent to in your latest session. If you can't find the server, extract a file ending in .log.gz and look in the extracted file.
Hope this helps!