Hi Savvy, I sometimes take the normal dose four times a day (its the regular bottled robitussin, so just whatever it says on the bottle you got). Other days, I just take three doses because I forget or am close to running out or something. This time around, i've only been taking it three times a day because I keep forgetting one in the middle of the day, lol. I would be careful with your IBS though... maybe start low...see how your tummy handles on the first day. As for the strange AF.... I think I've had some like that before in the past... way back when I was on the pill though... it would maybe stop for half a day and I'd think it was on its way out, and then it would start up again. Not often, but occasionally.
I love the positive vibes everyone has too.

This month, when I talk about it to my DH, I basically say "since i'm getting pregnant this month", or "When I find out I'm pregnant at the end of the month", or whatever. I talk and think as if I already know I AM getting pregnant this month. I never question it in my mind at all.