I'm almost certain my daughter is pregnant and hiding it. Advice needed

Good eveningI think my 16 year old daughter is pregnant and hiding it from us, how should I approach the situation? Over the past couple of weeks she has been walking around with a nasty attitude, she been eating like crazy, I'm unsure if she's been using pads/tampons or anything because she's taken them out of her bathroom altogether, and she's been closed off in her room most nights. Like I said I'm almost certain that she is pregnant and I want to approach the situation with care so that it doesn't turn into an argument. My husband thinks I'm overthinking it all and says she's just being a teenager, and my other daughter said she hasn't talked to her about it either way so she doesn't know. via /r/Parenting http://ift.tt/2dscBsb