So, I'm really very new at Minecraft and only started playing a few weeks ago. When I was at home over Thanksgiving break, I started up a server for my sister and I to play. Then I went back to college, and now... I can't get on my server. I looked up different troubleshooting issues others seemed to have, similar to myself, and tried using my external IP to connect to my server, but that didn't work either.
Is there any way I can get on my server? Or am I just stuck until next time I visit home?
Note: the specific error message that comes up when I try to connect to the server is "can't resolve hostname."