How do you keep it together?

How do you keep it together while gathering evidence before confronting WS? The last time I suspected I couldn't hold it in and confronted him before I had proof. All I had were phone records showing H & OW were talking up to 3 hours a day every work day and texting nonstop. He of course denied anything physical, or even emotional. They had been friends for years & he just needed someone to vent to. He did realize it was inappropriate & it bothered me, so he voluntarily cut off contact. A few months later I asked if he had talked to her and made it clear I never said he had to cut off contact, but that the amount of time they talked was inappropriate and I just want to know if they're communicating. He said he had not talked to her since cutting off contact. Fast forward 6 months to now. They have not communicated at all via cell phone (I still check). But they are emailing. It seemed like harmless banter until I saw them make plans for tonight. He teaches part-time at local college. Told her he'd be done at 7:30. When he called me he said he'd be done by 9. I saw an email from OW saying she'd be there by 7:45. I texted him around 8:30 and he wrote back saying he was wrapping up class. Then he just called at 9 me telling me all about his class which just ended. So at the very least he is guilty of lying to me. Looking at his email he is being shady & deleting their conversations everyday and even removing them from the trash permanently. I don't have his password yet, but he had left his computer signed into gmail the past few days, so that's how I've checked. I installed a keylogger so hopefully I'll have the password soon. I don't want to tip my hand too early because then they'll just find some other way to communicate. In the meantime I have to act like everything is normal. This is killing me. I can't eat or sleep. My heart is beating out of my chest. I'm pregnant, and this can't be good for the baby. Any advice for not completely losing it or confronting him before I'm ready? Sorry so long.

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