Clingy infant?

Brittany • baby #2 is on the way!

i'm about 12 weeks pregnant.. (if it makes a difference) but my nine month old has been so clingy the past four days. will not play with toys, will not be set down on the ground.. she crawls on top of me and will cry and throw a fit if i'm not in her view or if i'm not holding her / letting her crawl and play on me... what do i do??