9 weeks and Bleeding

I thought my pregnancy is going smoothly then last monday night I saw bleeding in my undies 😫 and I was scared, the next day there are more clumps of blood and I'm scared that I'm going to have a miscarriage.. I will have a check up on friday.. I hope everything will be alright... if anyone here have the same experience can you share it with me because I've been thinking too much about my bleeding ... It will help me calm down ..