Hi Snuggle,
I am quite small so that might be it I guess. But you're not big going by your photos hun!
Try pressing with about 3 or 4 fingers quite flatly into your tummy where you feel the poking. Sort of like you have to put your hand to check your breasts for lumps, if that makes sense! Leave them there for a few minutes or so (obviously, don't press too hard though!) That's how I could feel mine earlier on.
K.xx