A.M.
There are only 2 kinds of pregnant women - worried pregnant women and very worried pregnant women. I don't know if it is hormonal or what but I have yet to meet a pregnant friend (and I include myself in this) who doesn't spend a reasonable amount of pregnancy time with some worry - it may range from the vague sense of unease or watchful wondering to high stress. So yes you are normal. the good news is that 11 weeks is passed the most frequent times for miscarriage. I think it is down to less than 5% at your stage. Try not to dwell on it and don't allow anyone to tell you "the scary stories" etc. Enjoy the children you have and think warm thoughts for #3. In no time, baby will be here :)