I really believe all the health symptoms that you list are directly related to your eating disorder. If you get that part under control, workout at a decent pace but not insane, and eat nutrient dense unprocessed foods, your body will recover.
Mineral deficiencies for example, can cause the blood pressure and heart rate to get really erratic as you stated. I'm not saying to take a mineral supplement, but rather get it from the foods you consume.
Juices (that you make with your own juicer) would be a good choice for you, as you can derive the maximum amount of nutrition from the food in a way that a weakened body can easy assimilate. They require much less digestion.
Smoothies are a good choice too.
Beating yourself up with that intense cardio & weight training is only making it harder for your system to recover; The situation becomes even more exacerbated in a nutrient deficient state.
I don't know how long you have been dealing with the eating issue, but it will most likely take some time to recover once you start giving your body what it needs, in the way of nutrients. You will go through the "healing crisis" in which you will experience highs & lows, detox and healing symptoms.
If you stay on course, slow & steady, you can rebuild. I think it would do you good if you could find a "support buddy" that could hold your hand through the tough times, so you won't be tempted to slip back into old unhealthy habits.
Hang in there...