Hi Nessa!
I'm sorry to hear you're having a hard time adapting, but don't feel like you're alone in this. I've been dealing with similar feelings and tougher issues with trying to place my daughter in school. I moved to London in March and it's been a tough adjustment. I did the long distance thing with my husband for over a year and every time I would visit the UK - I loved it. Living here and visiting are two totally different things.
You should be so proud of yourself securing a job interview, like others have said, it can take months to secure interviews/employment. I wish I could start seeking work, but with my 9 year old not in school and my husband's family living in Surrey - it's not an option at the moment. In my opinion, 2 weeks is a short time to judge your situation. It takes balls to uproot your life, move somewhere new and adjust to a completely different way of life. Give yourself some time..
Talk to your husband and let him know you're having a hard time. Try and bond with his children, keep plugging away in the job market and try to join an activity, gym or group. You can meet some nice people that way. I'm not sure where you live, but if you're in London - I can meet up with you sometime. Hang in there!