Faint test and low hcg

Based on my last period I would of been five weeks last week(period started 24th June) but I tested negative on the 25th July got a line on the 27th that was still pretty faint and then got my blood drawn on the 28th which was low hcg.

Freaked me out when I got my blood results yesterday but thinking maybe because it was still a faint line my hcg just didn’t have a chance to rise much and I probably ovulated late? They gonna recheck my blood next week. Just finding this whole waiting out the first trimester quite terrifying