I'm fearing I won't ever have a BFP

Me and my partner have been trying for about 9 months now. I have very irregular periods they come whenever they please. 
We are smokers but today we quit in hopes that this will some how help us!
I would just like to talk to someone just like me for support! 
What are the positives of quitting smoking! 
I am going to the doctor to get checked for my period issues soon, but till then can someone maybe give me some tips or anything? Nobody usually replies to my things but I'm hoping someone will.