Thanks alot to everyone who has replyed! Does make me feel better to know that i'm not the only one who has had trouble finding the heartbeat...keeping fingers crossed for two weeks time when she can try again with my wiggly little monster!! I think she did say my placenta was probably at the front and it was hiding behind, and she said my fundal height was the perfect measurement it should be so I guess this reassures me!! (And my pants don't fit anymore so i guess it is growing well!)
Thanks again guys...I'll keep you posted in two weeks