Do chiropractors do well in reducing back ache?

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got to your doctor for check up
I suspect that you are standing all day on hard surface so the backbone may be out of alignment
talk with a chiropractor for an alignment to release the muscle tension which cause the head ache
spine alignment when lying down is essential to avoid head aches so check the pillows you are using

Chiropractors are not doctors or otherwise properly trained medical people.

If you have a health issue consult a qualified doctor. I have had some experience with chiropractors over a number of years and whilst they can do some good in very limited areas I would be extremely wary of claims they might make about diagnosing health problems you may have. By all means get an opinion from them if you like but consult your doctor in any event. Also ask them lots of questions, ask them to demonstrate proof of their claims etc. and you will soon identify their limitations.

Talk to a chiropractor about the way you hold on. I discovered (front seat) that lowering your elbows releases tension on your neck and shoulders. I try to ride like that all the time, now, and find I can easily do 3 or 4 times the saddle time I used to. My rear
gets sore way before my neck & shoulders, from that one simple tip.