I'm so sorry. Your reaction is normal. Of course you are going to cry, it is because you loved your cat and now they are not physically with you. Take your time and be kind to yourself. I felt utterly bereft when my old mare died, I didn't think I would ever stop crying. I am still tearful about Toffee and Ripple (guinea pigs) who died before Christmas. I feel their absence and miss them every day. Time does not exactly heal, but it does allow the emotions to be dulled a little, and then you are able to remember them with joy, instead of sadness.