miscarriage

Hey I have been trying to conceive for a year now and last month was sucessful! I found out on the 6th June 2014, I was 5 wks. But 10 days layer I unfortunately miscarried. Now 6 weeks on I believe I am pregnant again! (Blood test tomorrow to confirm for deffo) but am extremely worried that I will miscarry again. I just want to know of other people have miscarried twice or some more information on statistics! I don't want to have to go through the heartbreak again but I realise it happens and theres no way to stop it. Thanks