Notating one rough semester GPA-wise
I got a 3.46


In general, a 3.46 is reasonably good. Given your otherwise excellent performance, it is not necessary to make excuses or explain. In fact, I recommend not doing so, for two reasons:


Grades are only one part of your application. You are clearly a "check" in that box, so there is nothing to gain by dwelling on it. In fact, this is likely to come across unsympathetically ("I'm a millionaire, but listen to my explanation about why I'm not a billionaire....")
The explanations/excuses you would offer (transition, personal conflict) are not particularly compelling, and are largely aligned with what the reviewers would have assumed in the absence of any such explanation.