Hi M 26 Married.. Last Month I Tested Tsh,t3 And

Hi m 26 married.. last month i tested tsh,t3 and t4... my t3 and t4 is normal but my tsh is 5.92... doctor prescribed me eltroxin 25mcg... and last month i got intimate with my husband... now i missed my period... i was so excited that after 3days of my missed period i had done pregnancy test but it came negative... earlier my menstrual cycle was normal... i am getting stressed... will the medication affect my menstrual cycle... i go for a walk everyday for 1hr... i lose 1.2kg in 3weeks...