Low tsh o. oo3 with normal t3 and t4.

I'm 28 years old female married and have 4 years old daughter my delivery was through c-section. From past one year I'm facing less flow in my periods and thus my periods last for 2 days so my gynec suggest me for ultrasound and TSH test. My ultrasound reports are normal but my TSh was low I.e 0.03 and t3 and t4 is normal I even went for FT3 and FT4 test which came out normal and prolactin test is normal. But my gynec have suggested me to see endrocologist for future reference in my issue. Pls anyone can help out there coz I'm really worried. Here it's very difficult for me to get one endrocologist. Through I found one I got my appointment date for 5/may/ 2019. So please any endrocologist reading this I'm waiting for your suggestions please help me.