Is pregnancy considered a preexisting condition for short term disability?

Hi, I am pregnant and feeling super sick. I found out two weeks after I went perm with my job. In three months, I will qualify for STD - short term disability but it mentions in my insurance policy binder that STD doesn't cover preexisting conditions. My carrier is Sunlife. Would pregnancy be considered a preexisting condition and exempt me from qualifying for STD? Any suggestions? Thoughts? Would be much appreciated. I live in Toronto, Ontario, Canada.