Please help

Sierra
So tomorrow I will be starting my 5th round off clomid 100mg. Good news is I ovulate every time but have yet to get preg. I have been preg previously 2 times so I know it's possible. I just don't understand what's going on, am I not having enough sex or is it just not meant to be. I've thought about just stopping clomid and just leaving it up to fate. I'm also financially terrified of multiples...any advice on how u achieved preg or successes....thank you