Whickam and Lydia run away

So I've recently found out that Wickham and Lydia have run off to get married. Mr. Gardiner and Mr. Bennet have left to go search for them. I do not know how I feel about this because I am not very fond of Whickam. Elizabeth seems to be very ashamed that Lydia would run off to get married to Whickam when she's only 16 years old. Her leaving the country to go get married at such a young age brings up many questions for me. Sometimes I wonder if she could be pregnant.