Is this just a evaporation line?

I’m 10dpo, I told myself not to test this early after being disappointed for the last 3 months. But I tested this morning, it was initially negative and then I went back up to bed and when I woke up after an hour or so . I looked at the test again as I was going to throw it out and a faint positive appeared. I’ve had this happen in the past and it turned out I was pregnant.

I’m hoping it’s happening for me but can’t help but feel anxious and feel like I’m going to be disappointed. I’ll test again in a few days! Good luck to anyone trying xx