Please help.... i dont want to do this for the wrong reasons.?

i need your help please... im 16 and two years ago i had a little boy who was stillborn. it was unplanned and was unberable to let him go. for the past 5 or so months i have been longing for another baby. not to replace the one i lost but i feel ready on the inside. i work and still at 6th form im still with the father of almost 4 years now. i dont wasnt to become pregnant for the sake of it. i long for another baby and i dont really know weather it is because it would be his second birthday in october or this is just my hormones. i have dreams about it everynight and they feel so real but i know there not please help me....