any advice?

My last period was on 28/12 and I got BFP this week. However the lines have been faint. I then did a clear blue digital which said 1-2 weeks. Now...according to pregnancy calculators (I'm only about 70% sure of when I ovulated as it was first month using opk) I should be 6ish weeks. I had a mmc last year and now this is making me panic slightly. Anyone had a similar experience? Pics below: