Do u think its stress ??

I am tired of hearing this sentence.. DONT STRESS !! i am ttc for only 6 months now.. I know there are lott of women who are trying more than that. I have a very regular cycle..I tested everything for both me and my husband(ultrasound,bloodtest,thyroid,papsmear,semen analysis) eveything is normal !!That makes it even worse.. I really dont know why the hell its not happening !!  And i am not stressing myself if i talk abt it.. I AM CURIOUS !! I know i will have a baby someday but i want it sooo bad.. I am curious i want to be more informative so that i dont miss anything from happening !! I dont symptom spot myself or i dont test before i miss a period !! What am i doing wrong ???