Early flower? How to reverse?

It could be just showing sex, watch out top bud, loads of white hear in-between other nods forming - preflower and I would not revert it back, girl can go coocoo from that ;) So would move that light away and leave her alone to blossom ! All the best !

will also need something a bit strong then 3w led. 10w should do it. Want to make sure all part are getting light as well.

Does not look like a pistil to me. Just a new node maybe something else, but to early to tell. You should not bet getting any sex showing out of the plant till you switch it to 12/12 lighting cycle as that's a photoperiod fast version on your grow diary. However going through your most recent diary entry she does look to have powdery mildew. Keep her under 14+ hrs a day of light and she will not go into flower. Good Luck

More info: she's getting a lot of heat along with the sunlight, I'm giving her alg-a-mic every watering to help out, and foliar spray. Could it be the heat stress? Or the light is too weak, it's a simple 3W LED I have on my laundry room. Or I need to leave the lights on for longer at night.