I highly recommend scheduling an appointment with a general surgeon or a dermatologist. Recurring belly button infections can sometimes be caused by a small anatomical cyst or tract that needs to be permanently closed, which a general surgeon can easily evaluate and treat. Since Neosporin and Betadine haven't cleared it, a doctor can safely swab the area to identify the exact germ. Resolving this before pregnancy is a very safe,

For a superficial skin abrasion near a fracture, first gently clean the area with mild soap and water. You can apply a thin layer of an over-the-counter antibiotic ointment, such as Bacitracin or Polysporin, or plain sterile petroleum jelly (Vaseline) to keep the wound moist and promote healing. Cover it with a sterile, non-stick bandage. However, because this abrasion is near a fracture, it is critical to consult your orthopaedic doctor before applying anything. Preventing infection is vital to avoid complications with the underlying bone. Seek immediate medical care if you notice worsening redness, swelling, warmth, or drainage.