Welcome Dee!
First thing: your weight loss does not seem abnormal but it is a little slow. I will come back to that later.
Second thing: have you had follow-ups with your surgeon? This feeling you describe of something going up and down is something you should be telling your doctor. This group exists to give you support and sometimes accountability. We can share our experiences with you, but I guarantee you they will run the gamut simplistic to super weird.
This isn't the sort of thing you want to trust to strangers. Make sure that you are doing everything you are supposed to be doing , that you are at the stage of eating that you are supposed to be at, and if all of that is in place, check with your nutritionist and your surgeon.
Assuming you're doing everything right and there's nothing wrong with your procedure, the third step would be to look at your actual eating. Sometimes we don't really know how much we are taking in, and when a person is feeling unwell, oftentimes we do turn to small quantities of comfort Foods. If that describes you at all, be aware that most Comfort foods are high in sugar and fat and can cause dumping, which is a horrible horrible thing.
I am almost 13 years out from my surgery and I still weigh and measure things. I count calories, carbohydrates, fiber, and most important of all I count protein. If you aren't getting the required amount of protein, you will not heal well or quickly. Plus, proteins escalate weight loss.
Lastly,how much water are you drinking? The recommendation is 1.9 liters or 96 oz of water every day. You don't sound like you're dehydrated, but you just might be stuck because you do not have balance in your diet.
Put your health first in the hands of your surgeon. Then take control at home and measure everything, keep a food diary Faithfully that documents every crumb of food that goes in your mouth, and do not eat anything with sugar or fat in it for at least a year.
You don't need to go to a gym or fitness center, but you do need to make sure you keep moving. Everything works better when you're addressing every system in your body. If you don't have workout equipment and you feel like it would be helpful to have it, just go to your pantry and get a couple of cans of crushed tomatoes or refried beans or soup or anything and do curls using the pantry weights.
Fill a pair of athletic socks with rice or beans. Tie a knot at the open end and wrap these around your ankles. Lift your legs, walk, anything's that you feel like doing, including household tasks if you do those like vacuuming.
Do a search on the internet for isometric exercise. This type of exercise simply pits one part of your body against the other, like pushing your palms of your hands together as hard as you can and then releasing and repeating.
if you have access to physical therapy tools, get a strip of elastic that you can tie in a knot, creating a a ring. Step into the ring and pull the elastic up around your ankles then, using one leg at a time, try to k i c k toward the front, toward the back, and toward the side. Allow the stretch of the fabric to make this difficult for you.
Don't exercise to the point of pain. Be very gentle with yourself. And don't forget to take your vitamins, minerals, and supplements. You have to take these for the rest of your life because choosing bariatric surgery means choosing malabsorption. Supplementing is the only way you will be able to get enough vitamins and minerals into your body so you do not become malnourished.
It probably goes without saying that you can never have your old life back. You are in a new world and I would like to introduce you to your new best friend, whose name is Dee.