Appendix surgery 7 days ago. 2 days ago throwing up. Fever at 99.8. Feeling sick. Collapsed lung. Trouble breathing. Light handedness. Arm and leg feel numb?

Time to go to er . I am not sure what exactly you are asking about, having listed out several different problems that need further explanation. Best place to do this is in the ER, especially since you are post-op with a possible fever.