3rd month of a plateau

Go back to basics. Are you weighing and measuring all your food accurately (be honest with yourself) Are you eating a proportion of exercise calories back (this will give you more fuel so your workouts are actually more useful and you burn more)

congrats on your loss so far! i think that plateaus exist but they are usually as a result of *our* getting a bit lax in our eating/logging, and not necessarily a *real* physical plateau. at east that's how it's been for me and others that i know. so as someone said above - go back to basics:

make sure you are diligent about weighing everything.
make sure you are logging EVERYTHING. everything, including that bite of cake, that cup of coffee, etc.

fail...oops

Also, I have muscle damage to my right ankle, which means I can be limited to the type of exercise I do. Low impact stuff mainly. I do incline walking for 20 minutes which burns around 240 calories. I use the stationary bike at the gym too. I also use a low-impact cardio home workout

I don't burn 240 calories running for 20 minutes. How do you do it walking? Are you sure your calorie burns are correct?

Sorry to hear about the plateau - I know it is frustrating. Chin up ::)

also i would look at your macros...cut back a little on the carbs and eat more protein. way more protein.

I personally would recommend eating more for a few weeks and see if that helps.
Find out your Basal Metabolic Rate (BMR) add calories burned from exercise and you'll have pretty close to your maintenance level. Adjust your macros too: your protein seems extremely low (.75-1g per pound body weight), at least 30% of total calories should come from fat, and the rest can be carbs.
Once you have that number try and hit it daily for a few weeks, convince your body it's not starving. If you maintain weight or go up after a few weeks at that level try taking away about 100cals for a couple weeks. Aim to lose .5-1 lb of weight per week. 2-4 lbs a month.
Also, don't forget to give your body cheat days/meals every 5-10 days where you go over your calories again to convince the body not to store calories and instead use them.
You don't want to adjust calories and gym time to break your plateau because then you won't know what actually started the loss again. That's my two cents

Increase your intake by 200 cals bringing your net up to 1400 - 1450. Do it every day for 2 weeks and collect data.

Although I am a much older male, I shared some of the similarities you discuss (though my calorie intake was much higher than yours, my eventual target loss was one pound per week). Now to be clear I didn't monitor food intake precisely (that came later), so all my loss was slight changes in food intake (I gave up sugar carbonated drinks, downsized some of my meals slightly, etc.)and mostly exercise. Ultimately, I dropped from 250 to 190. But once I got there, getting down to my target weight of 175 seemed impossible. I basically stayed between 186 and 190 for a year.

Now, the good news is that for the year, my measurements changed fairly dramatically. My waist, hips and chest all shrunk by about 4 inches each.

After a year at the same weight, I finally did a step change in my activity level as well as really accurate calorie count. I did eat back my exercise calories to keep the 1 pound per week drop. It went more slowly than that. But, 11 months later I reached my ultimate target weight and switched to maintenance. Even then my weight continued to fall to a low of 165. Since I've taken on marathon training (and have already run my first marathon, preparing for my second), my weight has stayed very steady between 167-170 (running 3-4 days a week).

Hang in there and know that measurements sometimes are more important than weight simply because the muscle and fat structures can and will change pretty dramatically with the sort of levels of weight change we are talking about.

When i hit a plateau, I dropped my calories to BMR for a few weeks and that kicked it loose.

Did you know you need to recalculate your calorie deficit after every 10 pounds you lose? You've lost a lot already, so it could be that for your current height/weight ratio, you're not longer eating at a deficit when you eat 1250 cals. I am short 5'2" and 44yo and there were times that I had to eat as low as 1050 to get a good deficit. So maybe recalculate your numbers.