What is considered “straining” after a rhinoplasty, have I caused any damage?

Normal social activity may be resumed when you’re dressing is removed after Rhinoplasty surgery, and none of the activities you describe seem to be excessive. We recommend decreased physical activity for three weeks postoperative to decrease the low likelihood of a nosebleed. Wishing you a happy recovery. Dr. Joseph. 

Straining means causing 1) significantly increased pressure to the head and nose or 2) a prolonged increase in blood pressure. 
Both of these may predispose you to bleeding after rhinoplasty. Opening a jaw for a short period of time should not interfere with your healing. Avoid exercise, sneezing though your nose (open mouth) and any other strenuous activities for 2 weeks. Good luck. 

Dear distressedpatient, You do not need to have any concerns about going along with your everyday normal activities after rhinoplasty surgery. My patients come from all over the United States and other countries and return to travel on day eight with no concerns. I have them avoid strenuous activity such as working out or heavy lifting. If you have concerns see your surgeon for a follow up appointment. Best regards, Michael V. Elam, M.D.