I used to struggle more with sleeping in spring/summer. I’m still a night owl now and do blame the years of doing night shifts. Have you tried a sleep spray with lavender or chamomile in or even a hot chocolate.
Is it noise that is making you struggle or the light coming through the curtains.
It could also be because you have been ill and its just taking extra time for your body to fully recover.
You could also try a herbal supplement like melatonin to help you fall into a natural sleep and even if it’s just to get your sleep pattern back.
Hope you find something that helps babe