I keep getting signed out of my account.

Here is a troubleshooting guide that may help with that
http://support.xbox.com/en-US/xbox-one/networking/random-disconnect-solution

if you want complete peace of mind go to https://beta.support.xbox.com/help/account-profile/manage-account/compromised-account-solution
and follow all the steps carefully to ensure that your account is secure and protected for the future.

don't change the password until you have confirmed that no-one has added an email alias.

Hi there, I would recommend changing your password again and logging out of any known devices. It might be that you are signed into a friends xbox or something like that.

Hope this helps!

Not that long ago, xbox asked me to change my password and for some reason when i turn on my xbox im not already signed in. Anyways, today i signed in and it said that my account was signed out somewhere else and then I was forcefully logged off
and apparently signed in somewhere else. I logged in one more time and it hasn't happened since. But this happened like 10 min ago so its been a very short time and im worried. What should i do.

I strogly suggest you to change your password istantly and to enable two-factor authentication, see his page: https://support.microsoft.com/en-us/help/12408/microsoft-account-how-to-use-two-step-verification

Hi there, please try deleting your profile from the console (profile only), clear the system cache 3 times. Restart your console and re-download your profile.

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Delete and re-download profile:
support.xbox.com/.../profile-move-delete

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Clear system cache:
support.xbox.com/.../clear-system-cache