I Have Swelling in Between my Boobs After Breast Augmentation and Lift 8 Days Post Op is This Normal? (photo)

Both of the things you describe are normal. To help minimize the swelling between the breasts, I often put a wide ace wrap around the chest with a rolled up bandage (Kerlix) between the breasts. This puts gentle pressure on that area and reduces the swelling. The abdominal tightness will subside over 1-3 months.

The swelling between your breasts is normal after this procedure and will likely subside within 7-14 days. The tightness you are having in your stomach is mostly a combination of the sutures used to tighten the muscle wall, the removal of skin, and swelling. This will all go down mostly over the next 2-3 weeks. Skin will stretch over time and I would give that several months to happen.