New Grower Help! Day 46 not showing sex yet?

Not sure if the seeds I was given are autos or not. Ive been waiting on them to show flowers but I'm 46 days into this grow and still not showing sex. I did have some issues when the plants were young. Such bad ph water, overwatering, then suffocating them with a layer of play sand at the base of the plants. The plants are very healthy looking and are still getting bushier everyday. I have started using 18/6 last week. No changes yet. I'm thinking I've got regular photos and have switched to 12/12. Is it possible for an auto to not flower this long?
There's some semiautomatic ones too. But I don't think they're as popular. (Could be wrong though.) Do you have the packages they came in by chance?
 
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