why is it taking so long!

Avie • Momma of 2 beautiful boys. 9/13/12 , 8/6/18. 💙💙💙💙💙💙 and a loving wife 8/23/14 ❤❤❤❤

so my SO and I have been Ttc for 7 and a half mths. Oct 18th will be 8 mths. I have stopped smoking, I have been eating healthy, exercising, taking prenatal vitamins the whole time. I went to my doctors on the 6th Mth of Ttc. and he says he is not worried about it till a year. and he did a pap and it was fine. I'm just so upset and discouraged. cause it's taking so long and I'm getting upset cause BFN time after time.