Can you explain further, please?
Why did the doctor's assistant tell you they could not find a problem? A problem about what?
If you have hypothyroidism, as measured by a blood test, you need synthetic hormone throughout your life.
This will also help keep you weight under control.
The medication may have to be adjusted form time to time so keep track of your symptoms.
Also, if you have debilitating anxiety, you may need medication for that on top of exercise, yoga and meditation, and a healthy lifestyle in general. Of course anxiety medications can have many side-effects, so watch out.
Finally, with a BMI of 26, yes, you do need to lose weight and check that none of your meds are actively working against your efforts.