You’re not the first and you wont be the last.
You installed yesterday, I can almost be certain that you do have swelling, you may not be able to see / notice it, BUT under the surface will be some inflammation where your body is fighting / recovering from the trauma.
Trust us when we say, just wait, give it about 2 weeks to heal.
Even then, the PM3 can be a difficult bitch, you will need the antenna to be right in the correct spot, millimeters matter.
Let us know how you are going in 2 weeks.