YANBU. Get a breast reduction.
I had a breast reduction in January this year and it's the BEST thing I have ever done. I'm 47 and I wish to goodness I'd done it as soon as I was done having kids. I was a 40FF and now I am a 38B. I bought my first nice (and underwired) bras this week and it's been a delight wearing them (you have to wear compression bras for at least 4 months but I've waited almost 7 as when I tried one on in La Senza back in May, it just didn't feel right yet). I was worried I might look out of proportion, but I don't at all (and I'm not small, I'm probably an 18/20 UK dress size). So many people have commented on how well I look - I carry myself differently without even thinking about it. I lost 7lbs instantly. That was half a stone pulling on my neck. I can wear vest tops, go braless in comfort, and still look fine.
My neck ache and tense shoulders went INSTANTLY. My friend had one just a few months before me, and when she said about that, I was thinking "nooo, that's the painkillers love". She was 100% right. I felt the release instantly and it was not due to painkillers.
I managed it, but breastfeeding was hard with such big boobs - my son was tiny with a tiny mouth and I can still recall (and wince at) the sharp pain as he latched on - he's 20 now. He just couldn't fit the whole nipple in his mouth easily so he would clamp on the end. Oh, the pain!
I couldn't bear my husband touching my breasts at all when they were huge, but having the reduction has opened up a nicer level of intimacy too. I have one nipple that's healed slightly puckered but I do not care. It's not like I want anyone else staring at them - gotta be honest, I do like looking at them myself now - I'm 47 with the tits of a 20-year-old, as my daughter proudly told me.
I waited 3 years (I'm not in the UK but I am in a country that has a universal healthcare system so I didn't go private/pay), but honestly, get to the doctors and get yourself on the waitlist.