SQLServer connection timeout

I've been working for a long time with a SQLServer 2015 project, logging in with win authentication. (SQLServer 2015).

Today I have a Timeout on my connection.

Why? Today I've changed my Password on windows, forgetting the SQLServer connection. UPS!!! The connection fails and I've restored the old psswd... and the connection fails... mmmm?

Then I've checked my connections on ODBC (I have a couple of apps running), and connection success.... lol?

Then I've returned to SQLServer (I'm trying to logg in with SQLServer Management Studio) and the connection fails. .... OMG!

I am trying to logg to my SERVERDB from my SERVERAPP with Management Studio 2015. ODBC loggs in, but management Studio fails. Both with windows autenthication.

I am not an expert with connections (nor on english ¬¬), but this is so strange.

Someone may help me, I'm getting crazy about that.

Thank you very much. I've been looking on web but no cases like that.