Coumidin symptoms and conditions

During my 6 months on Warfarin (Coumidin) I experienced tremendous lethargy and short term memory loss. No issues with other commonly reported symptoms of hair loss, heavy legs,…
I am a 49 year old male. In January 2008 I was diagnosed with DVT's in my right lung. Interestingly I experienced 100% of the pain on my left side though the DVT’s were on the right. The onset of symptoms was a pain in my chest like I pulled a muscle lifting something. The pain progressed from "notable" to progressively uncomfortable, where I was restless in bed to the point of not sleeping. On the 3rd day after fitful sleeping and progressively more painful breathing, I made a doctor's appointment for that afternoon. By the time I got to the Dr. I was sure I had made the right decision (I am male and avoid these things).
My primary care did an EKG to rule out a heart attack which the symptoms were identical to; sharp pain in chest toward left shoulder and arm, trouble breathing. I was sent for an X-ray and was very uncomfortable laying still on the Xray bed as the pain as I inhaled had gotten sharper. I went home and resumed office work but soon was in extreme pain with each breath. So much pain that I could not lay or sit, but collapsed to my knees where I stayed for 20 minutes until I could move again. I called the doctor's office and was advised to go directly to the ER. Duh. The ER again ran an EKG and ruled out cardiac issues.
Three ER Attendings pondered my condition for an hour or so and then began asking as series of questions and at the 3rd question – had I flown any long flights recently? Yes, several transatlantic – at which I saw their glances and was whisked off to a CAT scan which confirmed DVT’s. I was put on morphine and some IV’s and admitted for 5 days. I started Lovenox shots and by the 4th day was feeling better.
Blood tests did not revel any genetic disposition (factor V) for clots and no family history so it was recorded as “Coach Class Syndrome”. I was put on Warfarin for (5mg/day) for 6 months. I was able to keep relatively good INR’s. I came off Warfarin (12 August 2008). I will have to take Lovenox shots before long flights. I am happy to come off the Warfarin as I experienced tremendous lethargy and short term memory loss. No issues and I have been off coumadim for 6 months now. Glad to have that behind me… hopefully.

I have intense headaches after taking my lovenog injection, followed by extreme fatigue. I have never felt headaches like this before-nothing helps them.
Patty