Sorry for being obtuse...what are blebs?
When M was younger and couldn't handle my letdown, I actually shifted her so that she was more on top and gravity wasn't working against her. I found that laying back in a reclining position was really helpful for that.
As for soreness, I found that I was sore just because she was eating so much (like any newborn). So, give your gals some time to toughen up...oh, and make sure she's got a good latch (even if it means re-latching a ton, which I had to do).