I Had my Tummy Tuck, my Tummy Feel So Funny, Feels Like There is Air Between the Skin?

It sounds like you are describing a seroma (fluid accumulation between the underlying tissues). It is normal for you to have some swelling post-op surgery. Do continue close follow up with your surgeon.

Inverted nipples can cause functional problems and emotional concerns for both sexes. An inverted nipple can look flat or a slit like depression or hole at the normal nipple location. There are different degrees of inverted nipples possible. Correction of inverted nipples depends on the problem. The objective is to reshape the nipple and areola so that the nipple projects out from the breast, enhancing the appearance of the breast while preserving sensitivity of the nipple. Potential risks include the loss of sensation, inability to breast feed and reoccurrence of the inversion.
On this site, I do my best to give advice without a physical examination but I want you to know that a physical examination by a board certified physician is always the best way to get the most accurate information.
 

Following abdominalplasty, there is a 2 year period during which the sensory nerves to the abdominal skin are re-growing.   During this period there will be some areas of numbness especially between the new belly button and the pubic area.   This skin has been fully elevated and the small sensory nerves are cut during the surgery.   With time many of these little nerves will regrow and sensation will return.  

Swelling of the abdomen also takes some time to fully resolve.   Generally by 3 months the majority of the swelling is resolved; however, if a patient has a long day on her feet, she may still experience some swelling for the first year.