I accepted written job offer but..

I haven’t heard back since and this was two weeks ago.

I’ve been trying to keep in contact with the CEO of the start up company I accepted the offer from, but she’s been wishy washy and hasn’t been updating me with anything.

My start date is next Monday 6/11

Could this mean she’s thinking of revoking my offer? I’m just getting worried bc I already put my 2 week notice at my current job....

I’m actually freaking out. Like why isn’t she giving me updates?