My cat is pregnant it's beek about a month and few weeks I guess. What's up with her?

Her eyes look weird .Like they are big and the white parts I don't know she looks mean. Also her ears are horizontal. What should I do with her eating habits? What do I do. I think she is four years.|||The best thing you could do is take her to a vet. And if that's out of the question, then call one.