Thanks for the replies ladies.

DP and I did DTD around the time of O and it was the one and only unprotected time we did it... But I took a HPT yesterday and which we're both relieved about - and making sure we don't make that mistake again! (Spotting also started bout half an hour after I did the HPT - although hasn't seemed to start up properly)
TBH, DP and I are only kinda new (bout 5 or so months the relationship) but we have talked bout kids. We've both agreed to wait till my DD and DS are both in school before we even think bout it.
I used to drink a lot, but now only one when I'm out. Haven't been thinking bout taking folic acid but thinking I should take a multi vitamin with folic acid included.

I honestly think a heavy AF is coming, at least that's what I'm hoping anyways (you'd never hear me say that!)