13 weeks 3 days cramping and spotting please help

Hello everyone I'm 13 weeks and 3 days I've had 2 previous miscarriages and 1 full term baby girl before them and she is now 6 years old I'm high risk because I carried my little girl just fine and had 2 back to back losses after her this is my 2nd longest pregnancy but at 13 weeks I've started cramping A LOT and spotting off and on I've had a u/s during this and it showed everything is OK but I'm still worried everyone keeps telling me to stay calm and not to stress but it's so hard not to if anyone has any advice I'd greatly appreciate it thank you all