First balcony, low maintenance 3L pot grow

Practically all pistils on top are brown, which I believe is way too early. Some flowers are starting to look plump as if there are seeds inside them? I've read autos can have pistils turn brown early if there's too much stress and this one has going through an overwatering once, heat stress once, topping, and nute burn. So will continue the process, but not expecting much.