Can someone explain my test results? tsh 3.72 t3 1.22 t4 0.83 tpo ab >900 should i be concerned?

Depends on units: "Concerned?" Absolutely -- enough to accept treatment for what I suspect is mild Hashimoto's with some hypothyroidism (low T3 (liothyronine) and T4, normal TSH) if this is micrograms per deciliter for the first two and U/L for the TSH. Anti-TPO is an antibody directed against the thyroid. This stuff is very common and you'll need to accept treatment if you want to keep your health.

Normal: thyroid function appears to be normal currently. given that your thyroid antibody is positive, you are at a higher risk of eventually becoming hypothyroid. That doesn't mean you will definitely become hypothyroid though. monitor this every 6 months with your doctor.