me and my partner would like another baby, i already have a 3 year old daughter from a previous relationship. my contraceptive injection runs out in 2 weeks time and i have had chlamydia tests done just to be sure which were negative but for some reason of late i have been feeling very upset and worried that there will be something wrong and i won't be able to get pregnant again, i am 23 my partner is 33 am i just being completely irrational? why do i feel so worried?