I am just plus one-ing on what other people have said. First of all living with pain sucks.
On the bike side though, I have the same compact ultegra as you and I ride up hills at an average of slow, in other words SLOW.
And I ride with professional triathletes (ok, not with, behind). So, I am extra slow compared to them. I started riding this bike one year ago and in that year I have gone from 4-8mph going up to 6-12 mph, lots of improvemente in one year. It is hard to be the slow person with fast riders. One of my mates just went and competed in his first Ironman at kona and came in 3rd in his category and 71st overall, trained 1 year, 6 mos seriously, talk about freaks of nature. And yes, at the rest stop they rest and wait for me and as soon as I get there, off we go again, spelling NO REST for me.
But, in the half ironman I did this year, who would have thought, I zipped by people left and right, it was kind of fun. But alas, I am most interested by my own improvement to myself, this week I went up one of our steep hills in the second to easiest instead of the easiest, boy was that an improvement!

You are gonna get there but it may be slow at first. All things have learning curves and we don't get to just jump ahead and those freaks of nature, well...we aren't them, they aren't us. (BTW, my kona winning friend takes way longer than me to finish a book, so he thinks I am a freak of reading nature.)