First grow, random seed, no idea if it’s auto or not, and wondering if I’ve over fertilized.

You could save lots of money by not buying AN, its overpriced but if it works for you then keep at it. Random seed is interesting... if its bag seed from some weed you got there is a higher then normal chance you will get some hermi traits, and in turn your identification of fem might be off. But if you know the approximate history of the seed, eg it 100% came from some pack you/someone have bought in the past. that's much better odds of it not being hermi. Also not knowing what it is in terms of auto/photo is tough. If its a photo you'd want to top it and auto not so much. The plant has big spaces between its inter nodes, this is normally from the light not being close/strong enough at the time. It should show its sex soon. autos normally go into flower in week 4 through 6. I see you have a diary for this but did not link it. the diary has little to no information in it but one pic for week 5, you call the strain a "Sativa- gorilla glue" then on your profile state your using a light that is advertised as 600W but you think it might not be a true 600w.... Why are you calling it gorilla glue? Given the size of your tent and how "bright" the pics look I think you are accurate that it is not 600w. Try uploading pictures of the light with its make and model to help trouble shoot that. ps lay a thick garbage bag down on the floor or something, you're going to fuck up the hardwood. I agree with Asnoriu some Mg issues poking tough but the feed should have a good amount in it unless your growing in generic Coir, it will eat up the Mg and Ca in its cation exchange sites if not buffered. Can combat this by giving it some CaMg supplement should that be the cause.

Looks like some magnesium issue is around. Inner space distance is huge, your light too weak. Stem is strong, colour if no so bad. By size i would say its not auto, you need to have 12 hours of night for her to start to flower. If you keep longer, you will need transplantation.