Thanks to everyone ITT. Did the things people mentioned (been sick so unable to for a while) and now wrist pain is almost gone and neck feels much better.
I think I'm going to order a 45 degree stem anyway since I'm not looking to go fast and it's quite easy to pedal so am stuck in the highest gears anyway. Are there going to be any unforseen issues with this?
https://www.amazon.co.uk/Mlec-Tech-Aluminium-Handlebar-Accessories/dp/B07DDM1HPH/ref=sr_1_14?s=sports&ie=UTF8&qid=1530218903&sr=1-14&keywords=45+degree+stem 