secretly celebrating!

Me And my boyfriend had a miscarriage Feb. Early weeks but I struggled majorly and don't think I could carry. Tonight using a cheap strip test I've found out we are expecting again. The lines this time are so dark and prominent I am getting a clear blue tomorrow. I have no idea how to feel. Obviously elated but so so scared. I've only told my friend. My mum knew about our last pregnancy and is still struggling to cope with it. And I'm scared it will happen again. Any advice? Xx