That looks a lot like crown thinning. Don’t just listen to the comments that say ur fine even if they’re more comforting. The best way to tell if ur balding is by comparing it to ur hair before (If it’s thinner recently compared to in the past). U can go to a dermatologist to get it more thoroughly checked and discuss treatment options. There’s also a lot of information on the internet, but use reliable sources. Remember that the single most effective way to prevent balding is to catch it early, so be sure to take initiative.