New here can I get some help?

Hi I have my sleep study next week but just wondering if how im feeling is indicative of sleep apnea and you're own personal stories.

My heart rate gets down to like 36 when im sleeping, I wake up with sore throat and headache a lot of days, I sometimes gasp for air when im sleeping and it wakes me up, im tired and groggy and have a headache most days, I can legit sleep for 14 hours straight if nothing else wakes me up, and yeah just overall a really slow heart rate that isn't explained by anything else (I've gotten it checked).

thanks!