One thing that happens to many of us is when we notice something wrong we tend to focus on it. Then if we have a bad day of shooting (just bad groups) we'll obsess on what ever issue we noticed. What ends up happening is a self- fulfilling prophecy...we make the bad shots happen.
I'd say, have someone else shoot the pistol, from a rest with accurate ammunition, to determine if it's you or the gun. You should shoot a group on one target, they should shoot a group on another target- side by side. If you end up with erratic groups- fix the barre (assuming the damage is small).
As mentioned, a picture would help.
As to buying another barrel-- so far, I don't see any reason why that would be necessary. That said, if you do get one, do not get a drop-in. Make sure the barrel you order will not fit the gun and have it properly installed by a competent gunsmith.