I AM NOT A DOCTOR... If you are worried about your sickness please see one, and check with your GP before taking anything in early pregnancy.
I can finally post this now that I've had my scan! From about 5 weeks with this pregnancy I had horrific morning sickness. It started off the same as with Rose, I was queasy, tired and felt like I was in a car with Andy driving manically (as he does). So fearing it would get worse I researched morning sickness and came across some rather boring but important articles (I'll pop them at the bottom for you).
The most important bit I came across was this "Over-the-counter medications for motion sickness should not be taken during pregnancy unless recommended by your health care provider. Many women have found that vitamin B6 is helpful for making mild nausea better. Vitamin B6 does not help stop vomiting. Your health care provider can help you choose the dose and how often to take vitamin B6 if you want to try it." (http://onlinelibrary.wiley.com/doi/10.1111/jmwh.12451/full)
So for a month all was good but I was very aware that I was still very early in my pregnancy and taking vitamins that I may not need at a dose that wasn't harmful (100mg a day, I believe that GP's prescribe up to 200mg a day) but that I am not a doctor. So when I came down with terrible flu for a week and couldn't keep anything down I didn't think much to the fact the the B6 wasn't going in, in fact I didn't even try and take them!
Then the flu passed but I still couldn't move from the bed. Every time I moved my head I wanted to vomit. I couldn't eat (which made the sickness worse), couldn't look after myself let alone my own daughter. Andy had to take Rose to his mother's overnight... the guilt was insane. It felt like morning sickness x 100. After a couple of days it dawned on me about the vitamins so I started taking them and forcing them down, they took about three days to kick in and on the Sunday I woke up like a new person, so excited that I woke Andy up at 6a.m. to tell him I didn't feel sick (sorry Andy!).
I've just stopped taking them again now and so far so good- I'm a little bit nervous and did feel a bit nauseas the other day for half an hour but I'm hopeful!
I thought I'd share this because until I really started digging around I hadn't heard of the B6/morning sickness connection. If it helps even one person with morning sickness then it is worth spending this time writing about it!