How long does it take a sprained wrist to heal after two falls?

True sprain. You have to be sure that these were truly sprains and not fractures, and to be sure that they did not cause the wrist bones to separate. If it is not better within a couple of weeks, you need to be checked by someone knowledgeable in this area.
Ligaments are injure. The ligaments in the wrist are injured and they are not healing probably due to the advil (ibuprofen) and Ibuprofen that stops healing from occurring. Stop thos meda and find a prolotherapist to do prolotherapy tho the damaged areas and you will heal. Visit www.Getprolo.Com or www.Aaomed.Org for a prolotherapy doctor and to learn about it.