How late is considered “really late”? When I went to my doctors appointment I was 18/19 days late. I requested blood to be drawn to check for pregnancy and thyroid levels. Their response was “Well 18 days isn’t that late. So we will draw blood for thyroid levels but take a urine test”. Took a urine test it was negative, have yet to hear about my blood results. I’m now about 29 days late. I originally thought my symptoms were weight gain and my missed period which is why I thought I had a thyroid issue (also have a family history of it) but since my weight has been steady my only real symptom is a missed period.