Hello doc. I am 33 years old having one son of 7 years of age and planning for second from the last 1 year. Last year my tsh level was 5.9 and as prescribed by doc. I have been taking thyrox 12. 5 mg. Now tsh level came down to 3.4. My last periods were on 30th may. After that we had unprotected sex during my fertile days. My periods were late. I checked on 4th july. But result was negative. Then I checked on 7th july bt the kit was invalid. When I was about to check on 8th july, I experienced heavy bleeding. But for two days only as my periods are 6 days long. Was I pregnant and miscarriage? I never took any contraceptive pills. I was also feeling nausea before one week of my missed periods.