I have 2 thyroid nodules and 1 is hypoechoic and the other complex should i worry?

Depends: Hypoechoic, hypervascular, or calcifications on ultrasound need to be addressed particularly if the nodule is > 10mm. The solid component of a complex nodule can be benign or cancer. Typically a nodule greater than 10mm should be biopsied by ultrasound or smaller if there are calcifications or prior history of radiation or family hist. There is no ultrasound pattern that is diagnostic for cancer.

Needs complete eval: Your question cannot be answered without more info. You should see a physician who is experienced in evaluating thyroid nodules, who can determine if biopsies are necessary. Some of the factors that can influence that decision include size of nodules, appearance under ultrasound, family history of thyroid cancer, and change in nodule size over time.