Inflamation at port site

I had my surgery on Nov. 26th so I am almost five weeks post op. I have been doing great with no problems until today. I woke up and noticed my port site incision was a little tender and as the day has gone on, it has become red and more tender. I noticed that when I pressed on it, there was just a tiny bit of discharge. It did not look like pus but, it was a darkish milky red. Is it possible for infection to set in at this late date or could it be from over doing it? I will call my doctors office on Monday since they are closed now. Do you think this is something that I need to have checked out before then or is this normal?