Kicked for "Logged in from another location"

[Samiversal]

A few minutes ago I randomly got kicked from Hypixel for "Someone logged in from another location" and I am worried. I've since tried several times to reconnect but I keep getting disconnected, unable to connect. Plancke.io says I am currently offline, which reassures me a bit, but I'm still worried.

EDIT: I am using a 100% vanilla version of Minecraft 1.8.9, not even Optifine is installed on it.

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