TTC in your 30s

I am 32 and believe I am fairly fertile.  I have an almost 11 year old daughter whom I got pregnant with while on birth control. I was also a surrogate for a wonderful Australian couple and had twin girls last March. I'm now remarried and got my IUD out in August of this year. I was told to wait one month, to let my uterus lining flush and rebuild from having the IUD. Then for Octobers cycle, I was at a conference for work the week I ovulated. I thought there might be a chance cause I didn't ovulate until the last day I was there, but I obviously didn't conceive, as we are now in November and AF has come and gone...with all that said, is there any supplements, things that I should be using to try and get prego?? I've been taking a prenatal vitamin and that is all.