We are trying to conceive our 2nd and been unsuccessful for 2 months. I have been doing OPKs and it looks like i am not ovulating until day 18 with a 28 day cycle so i am concerned i do not have enough time for implantation. I would love anyones ideas or experiences. I am 37 and take vitamin d and folic acid and am going to start vitamin b6 and omega 3 as i have heard good things. Many thanks.