What causes my eyelids to be droopy most of times? (Photo)

Hello, I have question to ask. I’ve noticed my eyes change their tilt/shape depending on day. It’s not photo angle, I’ve noticed change in mirror as well. It’s not makeup as well. They’re droopy and downturned most of times but rarely they’re upturned and prominent. It’s not that visible on pics. I’d like to keep them that way. I tried to sleep and drink more but it doesn’t help. I thought it could be because of my Hashimoto disease and hypothyroidism but I’m not sure