Thanks Freya and Groffy for the reassurance.

Alot of people I have spoken to know of it but have no experience with it *sigh* He had the ultrasound yesterday afternoon so waiting on the report. And yes Goffy I have been accused of being a paranoid mother.. admittedly I was paranoid about BFing as I wasn't successful (lacked the proper support) with DS#1 who failed to thrive and therefore was anxious to know how much he weighed each week - hence the CHN telling me I was paranoid when I rang about the vomitting because he had had such HUGE gains and that I was overfeeding him which was making him vomit GRRRR if only I had trusted my mummy instinct straight away we may have had some answers already. So know just waiting by the phone........

Thanks again x