Warfarin Sodium and birth control pill

I am a 39 year old and have been on warfarin, 15mg a day, for four months. I feel slugish, have dizzy spells, and just can't focus. I also have memory issues and sometimes can't even remember family cell phone numbers. I had a PE while on vacation and also an infarction in my lower right lung(due to Birth Control Pill). I will be on blood thinners until next July. It is nice to know that others suffer some of the same side effects. I also expereince indigestion since I started taking the warfarin and was told by my doctor it is the food I am eating? Wasn't like this before the PE.