Brown discharge that's getting lighter?

Hi ladies, I am on my week 5 of pregnancy, but this morning there was brown watery discharge when I wiped, however it became lighter in colour and flow during the day and now is very light brown. I did not get any pain or severe cramps, just the usual symptoms.

Today it would be 14 days after ovulation so probs the day when my af is due.

I am going blood test tomorrow but still very worried. Maybe somebody experienced something similar, what was the outcome? I am prepared for the worst lol.🙈🙂

Thanks