@viverrid, yep that is exactly where it is. You've got people from the Lark st/Arbor Hill area getting on right there, and then in another 1/8 of a mile you've got the exits that go to 787, etc.
@NJ-Brett, indeed.. I've been riding small displacement bikes for five years, was just starting to feel comfortable on the highway. I see now that was my mistake.
Thanks for the replies, nice to hear them. No soreness today after I started walking around, haven't had the need to take any drugs, so far so good.