Alfiesmadmother yes I have had periods of feeling really furious too, as well as devastated, ecstatic, terrified. Hormones are great eh? Right now I've been feeling like throwing up for about 8 hrs - longest stretch without break yet - so weirdly feel calm as think I had this at the cross over between week 6-7 in preg 1: so think this is normal for me.
On the alcohol front, another antibiotic-based excuse I've thought of is sinusitus. It's not visible (i.e. no symptoms to 'act'), best to say you started the course a few days ago so now only have a mild pain in the sinus area (behind top of the nose and betwen eyes), better still can say doc advised alcohol can aggrevate it!
Londonlottie and Timette Re. bleeding. Don't know if this helps... but when I had this in unsuccessful preg it was most days (not just when I looked for it, but like period starting most days), went from red to brown, to black, and back to red (i.e. not just old), pains were on and off and central (not side stretching pains). Having said that, I'd still talk to a doc as you may get a referral for a scan sooner that will put your mind at ease.
I read on the Dec due thread (I think) that it's better to eat regularly and try not be sick. Thus, I've had a Chinese takeaway tonight, choc cake maybe next, but also fancy marmite on toast (I stop feeling sick for the moments I'm eating and for around 15 min after when I just feel tired!).