I'm an 18yr old mother and is seeking for advice from people help?

hi i am a 18yr old mother i had my son 6months ago, i am a good mother i had never left my son for more then a sec. i always take him to his doctors appointments and is doing everything right but my family aka cousin is threing me with defacs and saying things like your a bad mother because you make your sister watch your kid all day and you never do. that is not true i watch him everyday the only time i don't watch him is when i am at work or is out paying some bills of mine my mother is lying to my aunt and is saying thing like omg did you know that lucy let her kid sit there and crys for hour the only reason why he crys is because is because he is teething and has his first tooth coming in thats all i feed him when he needs to and change when he needs to i also gave him my attintion when he wants it everyone beside my family even people i don't even know says i'm a really good mother and that i'm really caring but it seem like my family is just wanting to take my kid away from me what should i do my cousin kidnap my son once and didn't even let me know antill i found out myself i didn't even report her because she was family and that i didn't want to start any drama so i just said it was okay but next time let me know and she tell me to go f**k myself i just can't stand the drama and how they are taking over and saying i'm making them taking care of him that is just b.s. what should i do? my son is everything to me and if i lose him i will lose my world i was thinking about a not letting them come near jayden but if i do they will just say things like well when he gets older we will just say that you made him stop seeing us but they are hurting me and is stressing me out to the point where i cry on my pillow at night i just also had a miscarrage and i had just had on my uterus and just found out i can't have anymore kids which kills me so i'm on bed rest till i'm better and yet they said that i still i'm a bad mother because i having my husband watch our son because i can't at the momment and my cousin said that she is happy that had a miscarrage i wanted to hit her in the face for that i just hate my mom's side of the family so please help look at the positive part of live please