Interstellar

At the end of the movie they say coop is like 124 years which would put it about 90 years from the start of the movie. When travel toward the black whole it was bout 23 year on earths, that like putt brand leavin for the second planet 60 years in the past from Cooper waking up in the hospital.
So we never got to Brand's planet since Coop went out to find her? I would think we went up with plan a since they figured out the gravity-quantum mechanics connection, but then where did they go? Going w/ my theory brand would be dead by now. She is not as affected aslong by the black whole than coo was. So she found planet before coop got to the hospital. Only knowing she didn't experience as heavy time dilation on that planet??
//confuses asf now
//discuss