I strongly recommend that you go to see your primary care doctor
about this issue as soon as possible. There are different potential causes for your swelling, and they can help you figure it out.
First, this could be swelling from varicose veins
or venous insuffiency, which is a common problem in women. The swelling is typically worse at night or when you have been standing on your feet all day. It is also a lot worse in people who are overweight, or with sudden weight gain, which might explain why you have noticed the problem getting worse recently.
Second, the swelling could be related to your thyroid condition, and it might be worth having your thyroid blood tests checked again to see if medication for hypothyroidism might be needed.
Finally, in rare cases, swelling in the legs can be a sign of a more serious heart or kidney problem. Your doctor will be able to perform a complete physical examination as well as potentially some other tests (chest x-ray, kidney blood work, electrocardiogram, echocardiogram
) to rule out these possibilities. Not all of these tests may be necessary, especially if your physical examination is relatively normal.
Book an appointment with your doctor today, and good luck!