Getting discouraged

I'm 31. I have 3 beautiful children and 2 beautiful step children. My husband and I have been together for 5 years. I know you must be thinking we are crazing for wanting to conceive again. But my youngest is 7 and his youngest is 8. We have an overwhelming desire to conceive together and complete our family. I had a tubal reversal 6 months ago. We were told to immediately begin trying to get pregnant because I have a higher risk of developing scar tissue and have a problem with cysts on my ovaries. I'm taking an herbal supplement called maca root. And have been for about 3 weeks now. I'm so hoping it will help. But I'm so scared that something is wrong inside and we won't be able to conceive. I mean think about it...we have a lot against us. I guess I'm looking for someone with a similar experience and hopefully someone with a success story. Need a boost of faith.

Jami