I Already Have A 2Yr Old But I Cant Conceive

Jaqueline • Hello My Name Is Jackie ? Im A Mother Of A 2 Year Old? Me And His Father Are Still together?? Trying To Conceive Our 2Nd Child? I Am 20 Years Old
Its been really hard for me to conceive is it maybe cuz i gained weight? I still have my period regular and everything is fine i just cant... im not a smoker or a drinker im 20 years old it sucks .