You definitelly need to visit your lawyer; however, in this particular case, there is nothing you can do. If Ocwen doesn't have a clear title, it can not sell the property. Depending on your time to move, you should ask your Realtor to look for another home like this one, and move on.
I wish you good luck.
Keller Williams Properties.
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You really should call a lawyer. Do it today. You need someone to read all the paperwork, and to interpret all the consequences of walking or not walking away. It may cost you money. But the truth is that the market is now well into an upswing, and every month you delay your purchase is costing you more than even a "white shoe" firm would charge you for a couple of hours.
Any advice beyond that you get from this forum will be insufficient, because we haven't seen the documents, and don't know what was or was not signed.