How do i know if its my period or a miscarriage?i wouldnt know if i was ever pregnant, i wouldve been 3 weeks but should i get checked? can they tell?

Period vs. miscarry: If you are or were pregnant a blood test would detect levels of beta HCG in your blood even if it resulted in miscarriage. Depending on how far along sometimes a woman may never know if they were pregnant or not. Our bodies knows if a pregnancy is viable in early weeks and if it isn't a miscarriage may result without anyone really knowing.