I hope others will chime in on this, but it looks to me, msreef, as though you spent almost the whole time during the sleep study on your back. (Apparently you turned on your right side at the very end.) That would mean we don't really know from the study whether you are more likely to have events on your back than on your side.
The other thing I see is a very large number of arousals. They are not called out as RERAs (Respiratory Effort Related Arousals), so I would guess they are spontaneous arousals, meaning their cause is unknown. I can't really see from the study what effect, if any, they had on your sleep stages, but they are certainly consistent with sleep that is not restful.
You were relatively short on REM sleep and relatively long on stage 3 sleep (deep sleep). Honestly, given how weird the sleep study business is for the patient, I don't think there's much to conclude from that.
Your instinct to get up when you wake up and can't get back to sleep is not a bad one. The trick is then not to nap during the day. As you google around to try to figure things out, you might take a look at Cognitive Sleep Behavior for Insomnia. Some people have good results in addressing maintenance insomnia with CSBi. Here's some information from a trusted web site:
https://www.mayoclinic.org/diseases-con ... t-20046677
Good luck with this. What you are living with is rough. To follow up on Okiebipap's post, is your doctor writing you a prescription for a PAP machine? Please ask to get a ResMed Airsense 10 Autoset. For most people, it is probably the most helpful PAP machine around.