J.S.
Hi Jennie~
I'm sorry, but I don't have too much advice for you. With my first son, now 5, I didn't breastfeed him. My breasts were HUGE and sore for just under 2 weeks. I tried tylenol & sudafed also. The only medicine that really helped me was Aleve. I would take the aleve consistently--every time I was able to according to the directions. I actually used warm compresses rather than icepacks & it helped a lot. I made sure that they were handy & accessible any chance I got to just sit and relax. When it got really bad, I would hop in the shower & just let the warm water beat on my breasts. That actually helped quite a bit.
Sorry I couldn't be of much assistance, but rest assured that within the next couple of days you'll be feeling much better.
And congrats on your new baby!!
~J.~