What to expect my dr will say after she thougt I had a tube pregnancy during surgery discovered it was big cyst going tomorrow to see if baby ok. 4-5w?

It depends . It depends on what made her think it was a tubal pregnancy, what kind of cyst it was and what she did. It is normal to have a corpus luteum cyst early in pregnancy and if she just found that and did nothing else it could be very reassuring. There is a small risk of anesthesia in early pregnancy but it is small. I would expect an ultrasound to assess the pregnancy. Hope this helps.