Nocturnal hypoxemia - AHI only 1.3 but spO2 87%

IM SO TIRED! But apparently my hyponea episodes are quite little (AHI 1.3)- idk if it's because I only slept a few hours at the sleep study? Sleep latency terrible, REM latency awful- like 190 minutes. idk, Im exhausted everyday and I pass out in the afternoons but I wasnt given Cpap or basically any advice?? halp