Firstly you need to have proper sleep habits https://sleepfoundation.org/sleep-topics/sleep-hygiene

Secondly, you need to make sure you do not have sleep apnea. To diagnose or rule out sleep apnea , you need to do sleep study
There are two types of sleep studies:
1) Full attended sleep study - you go to hospital at night and sleep overnight and next morning on waking up can go home/work straight away. Cost < 100 in government hospital but in private can be anywhere from 1000 - 3000.
2) Partial sleep study - done at your home. Information obtained is not complete but good enough to know if you have sleep apnea or not but deficient in a number of aspects depending on the type of partial study done. Costs 250-350. Mostly done by private set-ups ( hospitals or companies dealing with CPAPs). They hardly do partial sleep study in government hospitals.

There are a number of ways of treating sleep apnea :
1) Loose weight especially if your BMI>30
2) Sleep on your side if the apneas occur mostly on your back - for this you will need the doctor to explain the sleep report in a bit more detail ie spending 5 minutes rather than 5 seconds (by just telling you your AHI)
3) CPAP which is currently the best option as far as medical science is concerned
4) Surgery if your surgeon knows how to locate the exact site of blockage when you sleep by doing a sleep endoscopy and also is an experienced surgeon in sleep surgery
5) MAD (mandibular advancement devices) or TAD (tongue advancement devices) - not so popular, not so comfortable and effective

Please be aware that by not treating your sleep apnea, you are at a health risk - it is just like having diabetes and not treating it. Yo must never stop unless you have loss a lot of weight and another sleep study shows that your sleep apnea has resolved due to your tremendous weight loss.