First, good job on all the weight you've lost so far!!
Second, sorry to be the bearer of bad news, but there's no proven way to target fat loss in any particular part of the body. Your primary fat stores have to be depleted first before the troublesome parts are recruited. The places you gain weight first are the last places to lose weight. For instance, I gain weight around my hips and butt and at my highest, I had a double chin and tummy weight. The first places to decrease were my chin and tummy. My hips and butt are still sizeable compared to the rest of me. That's going to take extra work and diligence on my part to get to the point where all available fat stores are gone and the last places are my hips and butt. Then I will start to see a reduction there.
When you say "eat healthy," do you follow any particular plan? Do you count calories, weigh food, measure out portions? I used to eat healthy as well (no soda, no fast food, no candy, etc) and I was still heavy because I would overeat. I would have twice the serving of rice that I needed just because I thought I was hungry and I felt like eating it. Same with fruits and curries that I made. Revisit your eating habits and see if you can determine a calorie range for your height, weight and goal. It will need some tweaking but you should figure it out and start losing weight. Eventually, your chin and tummy will go down.
Sites to figure out calorie requirements:
Freedieting,
dailyplate and sparkpeople. I think with sparkpeople you need an account to figure out your calories. I don't use it so I'm unfamiliar with the site, but there are plenty of chickies here that can help you!

and good luck in your journey!