Line progression okay?

I’ve been a little anxious over my tests the past few days. With my twins I got a faint positive at 9DPO and a clear, strong positive at 11DPO. But with this pregnancy I got a vvvvfl at 9-10DPO and it’s taken 3 days to get a stronger positive, and it’s still fairly faint. I’m just nervous that my HCG isn’t rising fast enough or something. Can someone please reassure me that this is normal? I lost my twins at 7.5 weeks and I’m just so hoping that this is a sticky bean❤️

(Also I hope this is the right group to post this in, just let me know if not and I’ll change it)