"I just recently got saved and baptized at a baptist church about a week ago."
Congrats, and welcome to the family. I was saved and BAptised at GReenwood Baptist Church in Pasadena, TX back in 1961.
"I visited a pentecostal church this morning and thought it was incredible. Thinking about making it my home church."
That would be a good thing - I joined the Assemblies of God in Abington, MA back in 1963, and have been an AoG member for most of the last 49 years. I was "Baptized in the Holy Spirit" in 1973, tongues and all, and STILL speak in tongues 39 years later.
"Now I hear a lot of the baptism of the holy ghost. What does this mean?"
It's a "Second act of Grace" that has several positive effects - Greater Appetite for the Word, Heightened Spiritual awareness, Closer Fellowship with the Lord, and a certain BOLDNESS to minister in His name, and "GIFTS" of the Spirit as listed in 1 Cor 12. And TYPICALLY you also receive a "Prayer language" that flows from the Holy Spirit.
"If i decided to go to a pentecostal church would my recent baptism still stand or would they want me to do it again under their denomination?"
The Assemblies of God would accept your "Baptist" baptism (like they did mine), so no problem, you'd be "Good to Go" they DON'T require the "Baptism in the Holy Spirit" for membership either, although there may be a "Membership class" to go through. But Different Pentecostal denominations do it differently. You'd need to talk to the pastor if it's not an AoG.
The United Pentecostal Church International denomination (non-trinitarians) WOULD NOT since they wouldn't even consider you Saved (Since you weren't baptized in the "Name of JESUS ONLY", and don't speak in tongues).
IN GENERAL, I've found that a "Baptist" baptism IS accepted in MOST church denominations, but there ARE "Lunatic fringe" groups that may impose their OWN ground rules as noted.
We had a fellow in Boston that claimed that you WEREN'T SAVED until you were baptized THREE times, FACE DOWN - once for each title of God.
Somewhere out there there's probably a group that requires you to strip to the waste in the winter, cover yourself with rancid apple butter, and run down the street screaming "WUBBA!!!", "WUBBA!!!!!" to be "Really saved".