I need some help!!

I am 2 years out from surgery.  I lost a total of 74 pounds.  I was a lightweight to begin with.  My ultimate goal was 125, which I never made.  I did get as low as 131 and then have started gaining weight. Today I was up to 138 (BIG GULP).  I am only 5'2 so to just be in the normal BMI category I need to weigh 136.  I am 46.  At about 4 months post-op I got serious about exercising.  Back in November I hired a personal trainer to help me with lifting.  I've done a total of 15 sessions with her, over an 8 month span.   I typically lift 2 days a week and then do cardio 2-3 days a week for a total of 4-5 days a week of exercising.  My weight was pretty steady until about 3 months ago where it has slowly creeped up and all my efforts to stop the creep haven't worked.  Two weeks ago I started journaling and I'm eating anywhere from 1000-1200 calories a day.  I've been staying at about 80-90 grams protein and 60-90 grams carbs.  I've cut way back on white stuff, no more bread, no more cereal and no more crackers.  My carbs are mainly coming from greek yogurt, cheese, fruits and veggies.  I have incredible restriction with dense protein and cannot eat more than 2-3 ounces of dense protein at a time.  I do have a protein shake most days because otherwise I can't meet my protein requirement.  I know my gain is legit because my pants are tighter.  Help!!  How do I stop this creep??  It has me freaked out because 5 pounds turns to 10 which then turns to 20!!

I also had a bod pod analysis done and my fat% was at 28%.  Which tells me I can lose more fat to get to a more healthy number.  This was my first bod pod so I don't have any numbers to compare.  However, when I was at a different gym they had one of those fancy scales that's supposed to be able to analyse your fat and the last time I had it done (which was a year ago) it said my body fat% was 32%.

How do I stop this creep? Any advice would be greatly appreciated.

A few things in no special order.  NO SUGAR!!  It stops weightloss in it's tracks.  The liver uses it for energy and disregards the fat that needs to be cycled out.  That is why the Atkins diet is effective (not healthy, but effective).  So maybe reduce your fruits and get more carbs from vegetables....Yeah I know...Boring!!  Also, muscle weighs more than fat...You may be gaining some muscle.

Well...to be clear........muscle weighs the same as fat..........a pound is a pound........but muscle is more dense and a pound of muscle takes up less space than a pound of fat.

With your workout schedule, it appears you may not be eating enough each day.  Have you considered that your body is maybe holding on for dear life in fear of starvation?  The more muscle tissue you develop, the more calories you need to support it. 

Have you had your RMR calculated to see what you need daily?  You may benefit from increasing your calories by a few hundred on the days you workout.  Sounds scary, but I know several people that saw the scale move once they "fed the machine".

You said your pants are tighter.........where?  around the middle??  or in the legs/butt--because I had this happen too when I started running-it was from the muscles getting bigger.

Oh, and I am 47..........and I do believe the lovely MENOPAUSE is beginning....and I'm fighting that middle age spread.........elastic pants are in my future!! Oh, and a lot of wine to get through it!!