Hi, I am a beginner singer and lately i feel a little soreness in my throat while and / or after singing. It's nothing really painfull and i am not loosing my voice or anything like that. But i am still worried i might damage my voice. I am also pretty sure i am not straining. What else could cause this to happen?

Hi, Florian! Allergies, dryness, cold weather, lack of sleep, and dehydration all come to mind. Please check out the following for some helpful info on vocal health:

Here's a live lesson I did on strain & vocal health: https://www.youtube.com/watch?v=s6HRdzfpT20

And an article on preventing vocal injury: https://www.30daysinger.com/blog/vocal-nodules-preventing-injuries