Welcome to Mayo Clinic's Connect, @whahoo . Great name! Is that how you felt when you had your cancer removed? lol. I think that we all have felt a good amount of relief after surgery is over. After I got out of the hospital, my expectations for a very quick recovery were pretty high, too.

You've just had major surgery! When there is deep tissue cutting into the chest wall you can't expect to just walk out and say goodbye. Depending on where the cut (s) were made and how deep they are, you could be numb for a while. Do you have muscle contractions?

How was your surgery performed? Was it open chest, robot-assisted? I am now 25 years from my first cancer and my numbness is gone. But my muscle contractions still show their ugly heads every now and then.
https://www.medicalnewstoday.com/articles/drugs-tagrisso-side-effects#mild-side-effects
https://connect.mayoclinic.org/discussion/chemo-tab/
You might not have to take any medications for your surgery, I took painkillers for a while, but everything is connected to your cancer, hence the Tagrisso. It is specific to cancer cell mutations of a certain kind. Please read the 2 links above.

How long have you been in Chemo? How are you with it? What kind of fullness are you feeling nd where?

Merry