Glad to hear the worry is a common thing! I am pregnant with my second child and also in that period of not feeling pregnant (I am just over 17 weeks!). Some days I can even forget that I am! Other days I worry like hell! My soon to be hubby (30 May!) thinks I am crazy with all the unnecessary worry, and I definitely don't remember being like this in my first pregnancy (maybe because I didn't know any different?). Oh well I have an appointment with the hospital this week and a scan organised for next week, so I'm sure that will put my mind at ease soon enough!