Richieesmom - see if you can find the Facebook groups for serra to ask them. If not I can post the question for you. However, just as a warning I'd be careful of taking stuff just on a whim. There's so many different factors that can cause infertility and you don't want to end up messing with the wrong one because it might not be the one that's causing yours and you could inadvertently make it take even longer to get pregnant. It doesn't sound like tubal issues are your problem, since you have gotten pregnant, don't have pain during ovulation, or a history of ectopics. I'd hate for you to invest time and energy into the wrong thing. Also as the girls mentioned before if you take soy iso and are already ovulating it can mess with stuff. However, on the flip side it could help. I don't know enough about soy iso to comment. I know others do though.
Hope you can get checked out to help alleviate your worries. I'm horrible at always wanting to self diagnosing myself as well. I thought I had every issue under the sun wrong with me: from thyroid to hormone issues to lining issues impacting implantation and everything in between. And now that I have been checked out I've found out all the things I worried about being issues are not even close to being my problem. So I was completely wrong.
In the meantime don't be afraid to ask questions of us or in another thread if you think it might be something. Chances are someone on this board has dealt with it and can give you some more info.
I know it's such a challenge not to want to give yourself the best shot by taking stuff to help. And if you do end up taking stuff, good luck. I hope it helps.