Early signs of miscarriage in first trimester

I didn't know I was pregnant until I saw a trusted GP for stomach cramps and unusual heartburn and bloatedness, he make me take a pregnancy test, I was already week 6. then I became really cautious with my movements. At week 8 to 9, I was admitted to kkh for a threatened miscarriage due to vaginal bleeding. i stayed for 2 nights and doc gave me duphaston to stabilise my pregnancy and advise on bedrest for 2 weeks. apart from my gest diabetes, All else was smooth until my baby boy was born almost 2 months ago.