6 days post op, dizzy, lightheaded, unable to walk around long periods of time. Incisions/implants/bruising all normal. Advice?

Your symptoms are not normal for six days after surgery.   Mild bruising is okay, but severe bruising could be a problem.  Dizziness could be from dehydration.  Be sure to followup closely with your surgeon.  Checking your blood count also not a bad idea.  You may be anemic.  I don't see a reason to panic, but you shouldn't ignore it either.

You could be dehydrated, vagal, or have another problem begging for attention.  Either get (safely) to your surgeon's office or to the nearest emergency room.