island deleted

hi this is probably gonna sound so dumb but i started a new skyblock island the other day and today i started up the server and saw that i was in the lobby so i tried doing /is and /island to go back to my skyblock island but that didnt work so i went to the compass, click the option for...

My name in-game is diggitydan2, yesterday around 5:20pm Est I was invited to someones island and like on other servers I believed it would just add me so I could help them, I did not see the part in chat that it would DELETE my current island... I know there are certain commands and files that...