I've been taking tests for the past week and they've all been negative and when I woke up something told me to take a test so I did and got this

I went to the bathroom just now and had dark blood in my panties then cleaned again and nothing. My husband and I didn't wanna get to excited but we did a little since we've been TTC baby #2 for 2 years now and now idk what to think I just wanna cry 😭 My periods have always been regular and last month we used preseed for the first time. Really hoping our daughter gets her sibling she's been asking for soon 😔