Have you had Xrays hun? If it is remaining separated the physio will be painful but it will get you back together again. I have to have Xrays immediately after birth and intensive physio, so I know it is not fun, but it is worth it to avoid a reconstruction. I would be getting Xrays if I was you, and getting so osteo, physio or chiro. If you decide to have a 4th, the Xrays will be invaluable.