A lawyer has an professional ethical obligation to communicate with a client. The timelines you have described seem too long to continue to wait for his response, but you should continue to try to reach your attorney. Keep a record of your efforts to try to reach your attorney via phone/email/certified letter. In the mean time, immediatly contact the Washington State Bar Association ("WSBA") at 206-727-8207 (http://www.wsba.org/), and ask what resources they can recomend in this case. You should also consider retaining an attorney to help you recover the settlement. You may have to file a complaint with the Bar association or take additional action.
If you have not been paid your part of the settlement, you might consider finding a lawyer who will send a demand letter to your prior lawyer for payment (or else face a lawsuit for that payment). If the case settled, it is too late to litigate that case again with a different lawyer. But you ought to be paid anything you are owed, and it's inappropriate and probably unlawful / malpractice for you not be acknowledged or paid. Good luck.
Please note: this answer is intended to inform and educate. It should not be taken as legal advice or a legal recommendation, as that would require a thorough review of all facts and circumstances. You may discuss the possibility of hiring me as a lawyer, but until we have an agreement in writing, there is no attorney-client relationship between us. Thank you, and good luck!