Doctor ran blood work to check for thyroid problems. the first test she ran she said was a screening test. the report calls it " i've had a high pulse and feeling really cold all the time, which is why i believe the doctor wanted to check thyroid levels.

It's : It's probable your doctor did a tsh, thyroid stimulating hormone, the test we believe to be most sensitive to screen for thyroid issues. Interestingly, people with overactive thyroids can have a high pulse, but they generally don't feel cold all the time (although that's a rule of thumb only). I'd assume your doctor did other blood tests as well as an exam. Depending on your general health, it's possible your doctor may order some other heart tests like an electrocardiogram, or even a stress test to help figure out what's up with your pulse. There are things that are known to cause a high pulse rate that need to be considered as well, including alcohol consumption, stress/anxiety, caffeine, and medication side effects.

Those are sympt: High pulse and feeling cold are symptoms which may or may not be related to the thyroid. Find out your levels. High TSH indicates hypothyroidism which goes along with cold intolerance but high pulse rate is related to low TSH which is hyperthyroidism.