I had a dvt which caused massive pulmonary embolus two years ago. what non-hormonal birth control methods are avalable? iud was tried and unsuccesful.

Several: For someone such as you describe considerations could include abstinence tubal ligation hysterectomy for the one partner: vasectomy condoms etc see a gynecologist for a full set of options it sounds lie your DVT and pe were truly life threatening.

Sterilization: If religon allows, sterilization of either you or you're partner may be your best fail-safe option. If not, then sponge or condoms would be considerations. I would discuss this with your gynecologist. Under no circumstance should you try any hormonal method given your history.