I am 5 weeks post-op from Breast Augmentation and my incisions are still not fully healed/closed.

Thank you for sharing your question.  Unfortunately without an in-person examination or full series of photographs it is difficult to offer definite advice but if your incision issues were due to the suture material "spitting" through the skin this should resolve quickly now that the knot has been removed.  In order to prevent additional issues be sure to maintain close follow up with your surgeon until you are completely healed.  Best wishes.

It is difficult to advise you without any photos of the area.  I recommend that you call your surgeon to discuss your concerns.  Be prepared that you may need to go into the office for an examination.