Thyroid triggered?

I was having some symptoms so decided to google like any other web md hypochondriac..

Started reading about thyroid issues and matched each and EVERY symptom- thing is I’ve had my thyroid checked within the last 3 years IF NOT when I had my prenatal appt. in Jan. (Not sure if that’s what the blood work tested ?? Input appreciated)

Has anyone experienced pregnancy triggered thyroid issues? Im not pregnant (that I know of.. ) but if it would be a possible reason why these have developed, then it would explain why previous tests didn’t show any issues