Infertility

I have two children so you would think the problem of infertility was solved for me.  I wish it was.  It's actually quite a long story but, to catch you up before I write out the saga, I will start by saying I have had one beautiful boy, adopted a beautiful little girl, and had 8 miscarriages.  You think I would be grateful for the two I have right?  Wrong.  Ok so that's not true I am grateful but still frustrated.  I think it is the long, excrutiatingly slow process that has brought me here.  Not to mention all the doctors saying I am still "within the normal range" in regards to my miscarriages.  That is until the last one.  Who would think you'd need to lose EIGHT babies before someone agreed that there is indeed a problem.  And the problem... well who knows.  I have my theories but the docs seem to differ in opinion or they just listen and nod but don't comment.  So I've done my own research, read books, scoured the internet and now... now I think I'm going for ONE MORE TRY.  Am I crazy?  Probably.