trying to have a baby

so i have been trying to have a baby for almost two years now with no luck. i do already have a 5 year old. now at first i was wondering if there could be a problem with my significant others possibly sperm production or something else. now i come to find out when that relationship ended he started dating someone else and she was pregnant within the first two months. me and my husband have been trying to have a baby for two years with no luck. i have tracked my periods, although they go month to month on a certain day then they change to i get them on the wrong days or i miss a period or it comes 2 or 3 weeks late. so now i really have no idea when i ovulate because my period comes when ever it wants. also i had some bloodwork done that showed elevated prolactin levals, now i researched that and that can cause a problem with fertility. however i saw my OB/GYN and he says all other hormones are fine so it probley isnt an issue it can be elevated because of stress and other factors. now i have quit smoking, i take vitamins everyday, i do everything ive ever read to optimize my chances, such as no smoking, vitamins, best positions that give optimum delivery of sperm, ive cut back on caffiene, better diet. my doctor wants to give me a dye test to check for blockages and go from there...i was just wondering if anyone had any advice or went through this already or just anything i am so despreately wanting a another child..

[40smama]

I think you should get a referral from your ob/gyn to go to an re (reproductive endocrinologist) - a specialist in infertility.  He (or she) will better answer your ?? about hormone levels/tubal blockages, etc.  Sometimes we need a little help to get pg - good luck and ssbd  -