Continuing rash

Need help, please....About eight weeks ago, I cleared some brush on my property for a few days and got into some wild blackberry vines and briars....A few days after, I started to develop a rash on the top of my lower arms....It seemed to occur everywhere I had been stuck from the briars.....

I have developed little singular blisters since that time that itch / look like Poison Ivy....But the blisters bleed when I scratch them, as opposed to oozing pus....I've had Poison Ivy before and the rash would always go away after a week or two....This rash is still ongoing and doesn't seem like it's going to heal....It is extremely itchy when touched, to the point where I scratch it until it bleeds again.....

Any ideas out here ??

Thanks