Anyone else??

Anyone else feel like all of a sudden things change?? For example- im 18w preg as of last tuesday and now i feel my baby WAY more. When sitting at work i feel basically a mass in my lower abdomen that i didnt notice just a few days ago and i can feel it wiggle more :). Just like at 16w when my bump suddenly became more noticable. Am i crazy to have the changes seem super sudden?