Need advice

We did our 5 day frozen transfer on the second of June. My blood test was supposed to be on the 15 but I got inpatient and took a hpt on the 10th and got a positive. This was at 10pm. Yesterday I took one at 10am and it was slightly darker, then this morning I used my first morning wee and it looks lighter than both others. Could this mean that I’m going to miscarry? Or could it be because the others were later in the day?

I didn’t take any drugs that stimulates hcg

This was our first ivf cycle 😭 I was so confident it had worked.