I have 100% sympathy for you. I had ds have severe colic and dd had severe reflux. Is it any wonder my tubes are tied?

sprauncy has great advice- I wore ds in a sling just about 24/7. He loved being crunched up in that. dd- hated it, put too much pressure on her tummy. But if you haven't, def. try that.
Another thing to try is Roman chamomile essential oil- very expensive but worth every cent. Put one drop of Roman cham into 1 tbsp of base oil (grapeseed, sweet almond- even olive oil will work, just not mineral/baby oil) Mix well and use a tiny bit to massage the abdominal area in a clockwise motion. You can also put a few drops of R cham oil in a bowl of warm water and put it under the crib at night- just make sure the baby can't get into it when awake.
Good luck- it is hell, but it does go away. And try to sleep when ever you can- sleep deprivation has been used as torture and can cause psychosis- as I am sure you realize!