I've always said that if you take some of that shwag brick mexi..and grew the seeds like you would anything else...you would end up with decent smoke. That stuff is not cared for like it should be, obviously. I have friends that bag on Mexi strains. In my head I'm thinking, ever heard of any old school Mexican land races? Such as Michoacan? Or maybe Acapulco Gold?
I imagine it's winter where you are (assuming US), so the plant should be in flower. Do you know how to check for gender? You say it's only 1'3"? Sounds like it hasn't been there that long, especially considering it still has it's cotyledon leaves (seed/water leaves). So it may not be showing gender just yet, but I am sure it will soon.
Are you in a state that allows medi (once again assuming US)? If so, are you a valid patient? If not, you are going to want to go guerrilla style here if you want to help the plant along.