There could be many things related to this but it seems like two main issues 1) You're being blown about by discursive thought 2) Your circadian rhythm is out

There could be many things related to this but it seems like two main issues 1) You're being blown about by discursive thought 2) Your circadian rhythm is out of sync For 1), I'd recommend taking up mindfulness meditation and practicing before bed. This will reduce stress and out you in a better mental state for sleeping. 2) could be caused by any number of things ranging from drugs (caffeine, alcohol, cannabis, sleep aids, etc.), insufficient exercise, not enough light in the morning, too much light in the evening, shifting bedtimes, noisy sleep environment, snoring, etc. Most of the comments around here will help with this problem though I'd be skeptical of anyone telling you to use medication or drugs for it. (I'm not anti-drug, I just think we don't understnad sleep or the brain well enough yet to effectively improve or induce sleep with drugs yet and most existing treatments seem to make you unconscious, but not necessarily asleep).