12-13 weeks pregnant and bleeding

Am

I'm between 12-13 weeks pregnant and this morning I woke up to really heavy bleeding that went through two pads. I haven't had any cramps or pain and the bleeding has died down to spotting. I contacted the midwives who told me to ring G.P. Rang G.P who tried to refer m to Early Pregnancy assessment unit but all they have advised is for me to call back if I get heavy bleeding again and it lasts for a couple of days. I feel like I have been left in limbo and I am concerned I am having a miscarriage. Has anyone else experienced this and ended up being okay?