How can i get back into a good sleeping pattern again?

Sleep: Sleep is driven by circadian and homeostatic drives. Identify your daily pattern by maintaining a sleep diary for 2 weeks or so, read about sleep hygiene, you can google sleep diary and sleep hygiene etc sometimes melatonin and light therapy are used if you have delayed sleep phase or advanced sleep phase syndrome.

Use good sleep: Hygiene. 1. Keep a regular bedtime & wakening time (to include weekends). Get up the same time each day, regardless of what time you fell asleep. 2. Make a regular, relaxing bedtime routine. Relaxing rituals prior to bedtime may include a warm bath or shower, aromatherapy, reading, or listening to gentle music. 3. Sleep in a dark, quiet, cool room on comfortable mattress & pillows.