Besides opks and preseed, does anyone have suggestions to aid in getting pregnant?!? :)

After multiple miscarriages, we are having trouble getting pregnant again and having a sticky baby!!

Going to start praying and working on our timing and lowering my stress levels which are high. Also going to stop smoking. But I was hoping there was a supplement or drink or something that would aid my body in convincing and nurturing a little baby!!

Thanks!! :)

Please help! I want this more than anything!!