left eye

So back in August I got my new prescription for my contacts. They worked great and everything until this month. My right eye is fine but when I put my left one in I can't see at all it's like I'm not even wearing the contact. Also when the left one is in it gets really dry but my right one is fine and when I take the left one out my eye hurts. I did recently start bc for the first time back in September. Do you guys think it's the bc that's messing with my eye or do you think something else is going on. I do also have a stigmastim in both eyes but it's worse in my left it that helps at all. Thanks guyss.