Paranoid

Jill
I feel I'm going crazy. I'm pregnant about 4 weeks. I can't stop worrying I am going to miscarry. 
My dad has been diagnosed with lung cancer and we are all really sad obviously. Treatment by Nhs is rubbish and he hadn't even started chemo etc or surgery and that was cancelled last week. 
We haven't announced it. I feel guilty that I have good news when he is going through this. I tried earlier than expected as I wanted him to meet his grandchild. So I feel selfish aswell. 
But my luck seems so bad lately, dad, someone crashed into amongst other things I'm scared I'm going to miscarry. 
I know this worry won't help and I'm trying to chill out but it gets the best of me at times. 
I'm worried my bp is high but GP doesn't seem to care. Just said I don't believe the readings are right! 
Sorry just needed a bit of a rant x