|Here is my 2 cents from the last 2 weeks trying to heal from this poison ivy.
1, go to the ocean, it will help. I wouldn't recommend exposing affected areas to the sun for long though.
2, DO NOT USE HEAT. NO NO NO, I know it feels good but It aggravated the condition to my whole body by spreading the allergic reaction and made swelling worse in my arm.
3. It seems like the action plans shared by many are good, waiting while treating everything topically is probably best if Cortisone or Steroids haven't helped.
Good luck to anyone suffering out there, you're not alone!