7 weeks post op Breast lift/augmentation, I notice a lot of skin sag next to both sides of breast. Do I need a revision? (photo)

I do see the deformity and we: A dog ear. You are still early at 7 weeks and hopefully the breast implants will drop and as they drop pole this loose tissue into a better position and make it less obvious.  If it is still present at 3-4 months then a simple skin excision can revise it appropriately.  This occurs because the surgeon  tries to avoid a long inframammary crease scar during your breast lift.

Your concern is understandable at this point, but it is far too early to be worried.  Whenever skin is removed, like in a lift procedure, there will be bunching up of the remaining skin somewhere, usually at the end of and incision line.  We call this a 'dog ear'.  In your case, it appears at the outside end of your under breast incision.  It can take 6 months or more for swelling and skin changes to normalize.  It is possible for the dog ears to go away completely.  This is why we advise waiting at least six months before doing a revision.  There are some situations that will not improve with time, but many will.  Give it time is the best advice for now.  Good luck.