Samir S. Rao, MD

Combining all those procedures into a single surgery can be done and can be done safely, but then key is finding a surgeon who is comfortable performing all those procedures at once and who can do the procedures in an efficient manner so the length of surgery is not excessive.   

I think it would be okay to have both procedures performed at the same time, although it would make the rhinoplasty recovery more difficult.  Rhinoplasty patients are usually more comfortable laying in bed upright after surgery, but following BBL you would need to be on your belly or on your sides. If you do separate the procedures I would recommend doing them at least 3 months apart.

Having endometriosis should not impact your candidacy for elective plastic surgery procedures.   Your surgeon should do a thorough evaluation and history and physical to look for anything that may increase your risk of having a complication.

Given the stretch marks I seen in your photos that I imagine come along with some skin laxity, I think you would be better served with a tummy tuck.  I would need make the ultimate assessment in person following a thorough evaluation at which point we could discuss the pros and cons of each procedure.

I do not see any problem with getting pregnant 6-8 months after surgery.   I have patients who have gotten pregnant as soon as 2-3 months after surgery without any issues.

I do not believe that your history of a traumatic pneumothorax would impact your candidacy for any elective plastic surgery procedures.

I do not have my patients perform breast massage after surgery.   I think the utility of massage is controversial.   One recent study looking at risks of capsular contracture actually found that breast massage increased the risk of capsular contracture.   Ultimately I would go with your plastic surgeon's recommendation.

I think a bilateral breast augmentation with a lift or small reduction on the right side may be a good option.   A thorough examination by a board-certified plastic surgeon would be needed to come up with a definitive plan.

Doxycycline should be just fine (given your allergies) to protect against the types of bacteria for which we give antibiotics before and after surgery.

PCOS itself you not preclude you from being a candidate for BBL surgery.   I would require medical clearance from your primary care doctor or endocrinologist to make sure there aren't any other risk factors that would need to be addressed.