Thanks for this.
I have contacted them and am going to take it in maybe Saturday afternoon to see what they think.
If you don't get on there (I hope you will - they are great people), then go on to Ben at Venture Bikes behind Printigo, just up the road towards town (can't miss Printigo - big and bright just before Stirchley Baths community centre).
Both are quiet and unassuming people. Listen and chat.
Part of the problem is that everying is new, and it will take a while to get used to a new bike and position. The road bike geometry is very different to what you are used to, and anything that puts your body into an unusual position will be uncomfortable for a while. It might take a few rides to nail down what the problem is, and what can be done to solve it. At the moment you are in a position where any changes you make will improve things, but what is down to the changes and what is down to your body adjusting is a bit of a mystery. Classic one is the saddle. Your bum will adjust in time to what is fitted. If you get a wonderful new saddle now, and fit an Aldi Gel pad to it, it will be so much better than the last one. But maybe not as good as the last one would have been anyway had you kept it on. On the other hand, being a woman, if you are trying to get comfortable on a men's saddle, it will never fit you well.
In 2011 I started running. Went to a specialist shop, ran on a treadmill, and was prescribed shoes with a bit of support on the inside. Two weeks ago they started to come apart, so bought a new pair. Again, specialist shop, ran on a treadmill - completely different diagnosis, and I am now neutral. Why? I think my body adjusted shortly after I started running, but after I had bought the shoes.
Got your pack for Ride the Reservoir yet?