I couldn't tell you, I kind of want to be like Crocodile Dundee, and be like "That's not thinning, nah that's thinning!"
If you have any miniaturization it's so imperceptible that all you need to do right now is don't go crazy on the oily foods, use nizoral 1x per week and do scalp stimulation/soft hairbrush/dermaroller work.
You could use topical castor oil, you are literally the prime candidate for it because there is no obvious thinning as compared to the kinds of cases you'll mostly see here. You're fine right now, you just need to do a few things and keep an eye on it, don't go nuking your hormones with finasteride, you will regret it at this stage.