Oh, Mary.....please don't be scared!!! You are doing just fine for this early in recovery. You must accept the drastic things that have been done to your body in this procedure. Your body doesn't just pop back in a few weeks.
I suggest you print off Jo's healing chart -
link is here - and refer to it often! If you check, you'll see that at your tender 4-week stage, the only thing that is possibly "healed" is your skin....you still have bones and all the soft tissue right in the middle of the healing process. That healing will produce the heat you might see in a low-grade fever or warmth near your knee.
I know it can be difficult at this point to see yourself as healed and back to a normal life, but it is coming. Honest!!! It took a long, long time for your knee to get to the poor shape it was in before surgery. You owe it to yourself to give your body permission to take some time to get it all back together again after surgery.
I am sorry to hear that you feel pressured to attend an out-of-town holiday event. Do you HAVE to go this year??? If so, be sure to plan on heavy icing and elevating of your knee. You will want to take pain meds on schedule (don't cut back!!!) and nap whenever you need to. If people don't understand....tough! Be sure you stop frequently during that 3 hour drive and get out to walk around a little. Retire back to your motel room whenever you need to for icing and a rest. And....if you must go.....be prepared mentally that this type of trip taken so early in recovery can set you back a little. It's one of those little trade-offs that are made if you really must go. I don't want you to be hard on yourself if you are pooped and hurting when you return home again. (((HUGS))) to you, hon. I know you are wanting this to all be over soon. And it will be.....just a little more time is needed.
Oh, and if you get grief from any "well-meaning" friends or relatives about your "slow" recovery, just sit them down to watch
broken link removed: https://video.google.com/videoplay?docid=-3347931048322867705# (definitely NOT for the squeamish)! It gets 'em every time!!! No one has a CLUE about what you have been through or what recovery is really like unless they have been there.