This sounds crazy but I used instead cups to conceive my ectopic pregnancy and my older son. I got pregnant both times the first time I used them. I was on my 11th TTC cycle when I conceived my ectopic but 1st cycle using the cups. Fortunately I didn't have to wait 11 (or 22 cycles like I feared) to get DS1....I got pregnant again pretty fast using the cups. Wish I had used them to start. Might have saved me a year.
Re: May 13 BOTB/TTGP?
www.amazon.com/gp/aw/d/B000X29GY6?pc_redir=1396199612&robot_redir=1
Now DS2 that's another story.