tehmina - I'm sorry about your MH struggle. 
Being childfree is not what I thought would happen with my life, but it is OK.
I like this poem. I think it applies beautifully to just about any situation in life with an either/or decision. We take paths, not knowing what will be down them, and it's not always abrupt impulse or free choice or even anything conscious that drives us, but somehow we still manage to make our story out of it afterwards, a story that isn't entirely about what we didn't do, but also isn't entirely about what we did do either.
The Road Not Taken
BY ROBERT FROST
Two roads diverged in a yellow wood,
And sorry I could not travel both
And be one traveler, long I stood
And looked down one as far as I could
To where it bent in the undergrowth;
Then took the other, as just as fair,
And having perhaps the better claim,
Because it was grassy and wanted wear;
Though as for that the passing there
Had worn them really about the same,
And both that morning equally lay
In leaves no step had trodden black.
Oh, I kept the first for another day!
Yet knowing how way leads on to way,
I doubted if I should ever come back.
I shall be telling this with a sigh
Somewhere ages and ages hence:
Two roads diverged in a wood, and I—
I took the one less traveled by,
And that has made all the difference.