I cannot comment on big opinions of others but I need to know your inter vertebral position of cervical and lumbo sacral region. It should be excluded. I think
intervertebral disc space in
cervical spine is compressed putting pressure on nerves and , may be some vessels too, causing first set of symptoms narrated by you.
If it's so please manage by traction or
cervical collar support.
Similarly for leg pains if any which is caused by lumbo sacral region. If not affected, other things may be thought of.
Heartburn n constipation: have lot of walks, water intake, fibers in food and some safe herbals sometimes since constipation is the habit of intestines and its not a disease. By above methods, peristaltic movements of intestines will be restored. For heartburn, primarily little qtys of
cold milk with a cookie or half slice of bread may be taken frequently. It will neutralise excess acid. If not settled,
antacid ( prefer herbal powder like Avipattikar chooran - little bitter) may be tried. If doesn't settle in a week, further checks for oesoophagitis etc may be done. So exclude simple things first. No need to take
stress. Life is for limited validity like prepaid sim. Don't panic. Enjoy it.
Hope it helps you.