Top one is how big she normally is, middle is her current size and bottom is how big her nipples are. I've also noticed white fakes around her nipples.
I'm not sure, can you see/feel movements of the kittens? Have seen and felt the movements for well over a week now. Lola got pregnant around 28th Feb so officially due 3rd May.
Pictures aren't usually a reliable source. As LolaSky asked, have you felt or seen the babies move? if so how long ago did you first observe this? Do you have any idea when she may have mated?