Childsupport question florida law?

I am 15 years old, i am 37 1/2 weeks pregnant with a boy, got pregnant by a 21 year old, he was 20 when i got pregnant, just turned 21 febuary 23, anyways, im very worried... im worried hes going to try anything he can to be in power of the baby, he shows signs... like i told him he isnt going to take the baby anywhere without me being there, and he flipped out and said, yet you can take him anywhere without me being there, blah blah blah, and he said hes going to put himself on childsupport so he will get him every weekend... and all this crazy stuff... his grandma, is freakin crazy, he lives with her and his grandpa... his mom acts like she dont give a crap, everytime i see her, she never says hey or anything, she has gotten the baby a few things... and im worried hes going to try to start things trying to take the baby away from me... i already got threatend by his cuzin and her mom, which both of them are alcoholics and pot smokers... he has a warrant in gerogia state wide, from a crystal meth charge having it in his pocket, which he said he sold it not ever done it... he was selling weed when i met him and smoking it everyday, hasnt done neither in a week... or two. is there anyway in possible he could try to take my baby away from me, im not letting him on that birth cirtifict, not letting him sign it or anything. under the fathers name it will say unknown.. i did that with my last son, except his father is 16. but has no interest in him what so ever, i tried to get support from him, did dna, but hes too young the judge said, so until hes 18 cant do nothing. but im scared the dad of this baby is going to call dcf and stuff trying to get him taken away, i do no drugs what so ever, my dad and mom has a past, but it was dropped, and dont do nothing at all, so idk im freaking out please help :(