Advice on what to do next, boyfriend not being honest

Hello, Ive been with my boyfriend nearly 2 yrs now and I know I shouldn't have but I looked through my boyfriends phone yesterday and I found that he is signed up to a website to meet people and that he's bi-curious (which I did not know) and looking for something new, I couldn't see how long he had been signed up for so I don't know if he signed up before he got with me or not, but shouldn't he have deleted the account by now? I also found that on Saturday he had created a new facebook account under a different name but with some of his pics, there's nothing else on the profile at the minute but its really disturbing me. I'm currently 4 and half months pregnant and I thought we was happy, I just don't know what to do.

Why should you not have been looking on his phone? I look on mines phone all the time. If I couldn't then he wouldn't be my boy friend. Couples keeping secrets and feeling like they can have stuff that the other cant be involved with is how this stuff starts. I would ask him what is going on with the web site and the bi-curious crap and the facebook profile. And who cares how you got the info. You have it and you want answers. He had 2 years to delete that account. You need to do what is best for you and your child and his complaints about privacy take a backseat to that.