There used to be all these Minecraft servers listed in my multiplayer list but now there are no servers listed. What do I do? I tried going into different wi-fi's but it still doesn’t work. What other ways can I fix it?
Might you have created a new profile, and used a different folder for your Minecraft files? That is quite plausible, especially if you've been clicking on the profiles buttons in the bottom left of the launcher.
Do you have any different profiles listed in the drop down box (highlighted in the image below)? If so, try selecting each profile, in turn before clicking play. You might just find your missing servers have been on a different profile.