I hear you, Pholi. I have those worries too as Mum had a missed miscarriage. It's only early days for me. I think I'm about five weeks. Won't know for sure until the scan in another few weeks.
I hope the trip is a good distraction for you. I've just transferred to a new job so that is keeping me busy.
Are the bloods to check hcg progression?
I tested again this morning with an Internet cheapie and got a more obvious second line which is encouraging.