Does it REALLY help?!

So I know this might sound bad but when me and my husband were ttc our first (which took almost 2 years) I used opk's within those 2 years with no success on its own. Then mixed in preeseed and weed the month we actually conceived. And it worked! This past January we conceived again (ended in mc at 9wks) the same weekend I decided to smoke a little bc I was stressed out and that so happened to be the first month we stopped preventing and just see what happened. Without using opk's or preeseed. And we conceived again! I'm starting to think does incorporating weed into baby making really work with ttc?! I know it's not the best thing to destress but could it both times be coincidence or does it really help??? Here we are trying for our rainbow baby and possibly thinking of getting into my little stash that's put away during my fertile week this month. Thoughts?