Some can be diagnosed as 'missed miscarriage' which has no symptoms at all but when you do a scan, no more baby. I had a natural miscarriage twice (years ago & last yr) and both with bleeding. Last yr I bled for 2 weeks. Thrice A&E visit, scanned, can only see my gestational sac but no fetal pole and given hormone pills to stabilised my pregnancy but Allah loves my baby more. I had contractions on the day my gestational sac came out in the toilet bowl. My advice is when you learn to know that you're pregnant, bed rest yourself. Very important in the 1st tri. Make sure your body is well rested.
i think not every miscarriage has a sign or symptoms but threre are indecations like bleeding and untolerable stomach ache.
Yen