As per today's recap on ssk:
At Katie and Bill's place, Brooke has a panic attack and passes out. Katie begs her to come around and she does. They decide to take her to the hospital. Bill holds her while Katie calls.
At the hospital, Katie and Bill leave Brooke with Dr. Meade. Brooke tells him she's pregnant. He decides to page Dr. Caspary. Katie and Bill pace in the corridor, wondering what Brooke was trying to tell them. Brooke tells Dr. Caspary she is going to have to share the truth and pray everything will turn out okay. Dr. Caspary says it's not necessary now; the ultrasound shows she's no longer pregnant. Brooke digests the news. Dr. Caspary leaves to update Dr. Meade. Bill and Katie appear and ask what Brooke was trying to tell them. Brooke says she's just been stressed lately; it's not a problem anymore. Katie leaves because of Will. Bill asks Brooke if she was going to tell Katie about them tonight. He says obviously the burden was too much for her. He reassures Brooke of his feelings for her, but says he's committed to his marriage. "Nothing like this can happen again." Brooke assures him their secret is safe.