I am 7 weeks post op and only lost 2 lbs this week. Is this how it will continue 1 to 2 lbs a week?

Everyone is different which is why you will find a hesitance of giving a "standardized number." Loss is dependent on a myriad of factors. Generally, the larger you were pre-op the faster you'll lose.

As long as your are sticking to the plan set forth by your surgical team you're doing exactly as you need to. Make sure you are getting all your Protein and Water in per day.

This happened to me my 3rd week post op, then the following week I dropped 7lbs. I think some weeks are better than others. Don't get discouraged. A loss of 2lbs is better than a gain of 2lbs. A steady an consistent loss is is equally as healthy.