Ugh that annoys me too when writers go wayyyyy to slow but I think it has a good pace. I don't think your last chapters were too fast though, some people just need everything writen out for them since they have no imagination.
Like when I write I barely ever go into detail with things unless I feeel its absolutely necessary! "She walked to the park found a swing, sat down and waited." About as much detail as I ever go into.