Long term neck pain sufferer here (post disc surgery) and I also have a reduced curve. I'd say my neck is very 'reactive', so some things people might suggest to help actually make me much worse. You might be the same, so sports massages and the Amazon massager linked to both increased my pain. I was off sick for a week after a sports massage, and spent a day in bed after using that massager. Both were just too intense for me.
Look out for what sets you off. Reading, sitting, using a laptop or tablet (separate keyboard and monitor at the correct height much better) knitting, long car journeys especially driving, and chatting to someone next to me twisting my neck all trigger neck spasms for me. Also, weirdly, small repetitive movements such as using a cheese grater loads or painting a wall. Obviously it's not possible to stop all the things you find that trigger symptoms, but you can try to work out what they are, take plenty of breaks and stretch out regularly.
Personally, I'd never let a chiropractor near my neck. There's no place for the high velocity movement they do in such a delicate area, and there's the small risk of dissection (tears) in the arteries. Definitely not worth it for me.
Conversely, I have found a classical osteopath wonderful. None of the dangerous fast movements in your neck, no crunching and clicking. Just really gentle fingertip pressure and stretching on the muscles in spasm, nothing more. My osteopath teaches osteopathy all over the world and also teaches anatomy to medical students, so I know he knows his stuff. Classical methods of osteopathy are much gentler, less dangerous and suit my reactive neck much better.
Heat pads throughout the day can ease things, followed by really gentle neck exercises using no force.
Syndol in the dark blue packet helps when things are bad, it's back in production, but the amount you can buy is limited because of the codeine content.
Once things are past that stage,a short course of diazepam and maybe an anti inflammatory, along with rest might be the only thing to bring respite. You are very unlikely to suffer addiction issues with a short course, and sometimes it's the only thing to help. If they're giving you naproxen, make sure to get something to protect your stomach, I ended up with a gastric ulcer thanks to naproxen.
I take amitriptyline 20mg each night. It makes a huge difference to the frequency of migraines, and reduces my nerve pain so is doubly useful. It takes 1 - 2 weeks to start working though so a short course isn't going to do any good. I've also had gabapentin, and whilst it helped, the side effects were awful.
Chinese acupuncture helps me too. Not the dry needling that many physios do, but the proper acupuncture.
In terms of a pillow, this one works for me https://www.sisseluk.com/sissel-soft-plus-orthopaedic-pillow It gently stretches your neck at night, but it's soft and comfortable. It's such a personal thing, and they are expensive but mine travels everywhere! Water pillows like these can also help https://www.mediflow.com/
That's the American website with all the info, but they're available in the UK from lots of places.
Best of luck and apologies for the mega long post!