Have you been checked for May-Thurner Syndrome? It is one of the most common causes of DVT and PE. I have it and it will cause irritability, memory problems, anxiety, fatigue, dizziness, pain all over body, headaches, migraines and just about any other problems. Some other vein compression syndromes that will cause the same problems are Nutcracker Syndrome, Wilkie Syndrome or Dunbar Syndrome. Hope this helps and feel free to private message me if you have any questions. Or want more info.