Vickiann, you are going to know after you take your new pistol to the range for the first time. An excessively heavy trigger relative to your hand strength can affect accuracy as well as time between shots. For a handgun to be an effective stopper, the shooter needs to be able to put multiple rounds on target fairly rapidly. If you feel like you are going to be more able to do that with your new pistol, you absolutely should make the switch.
Sorry to hear that you have to jump through such hoops as proving that a threat exists in order to adequately defend yourself, but I wish you well in that aspect as well as all aspects of what sounds like a difficult situation for you. Some folks here insist that their revolver will always be enough, but many opt for the higher capacity of a semi-auto.You know the risks you are facing, so arm yourself accordingly.
Wishing you all the best. Stay safe.