Frustrated!

For the life of me I cannot get past 259. I have been exercising and staying under  900 cals a day and the scale won't move. My band is empty and I go in for a band filled June 30th. I pray that it helps curve my appetite and boost this weight loss. God knows I am doing all I can. I cannot fail at this! I know I'm being a little hard on myself, I just had surgery 3 weeks ago and have lost 13 lbs in weight and 4 inches in body mass. I am scheduled to see a bariatric nutritionist today. Maybe she can help me shed some light on the situation. Until then Im going walk a couple miles to clear my head. Thomas and I booked a 4 day cruise to the Bahamas for the end of July. My goal is to weigh 249 before we leave. I gotta a lot of work to do but the one thing I know about myself is, I am up for the challenge! Nothing has kept me from success and I won't let this weight loss journey mess up my flow.