Spotting and scared...

JG
I'm only 4 weeks pregnant with my rainbow baby. I had a miscarriage in mid March. I've gotten positive pregnancy tests since 10 DPO and the lines are darkening each day I've tested. I started spotting very early yesterday morning (pink). I woke up that same morning to almost no spotting (brown) and did not really spot throughout the day. At around 10pm last night the spotting worsened and got a bit heavy (pink to light red) then tapered off to nothing. I have not had any cramping. Today I'm still spotting and I am so beyond worried and scared. I know this is not AF and all my tests are still BFPs. My OB doctor's office is closed today and I won't be able to call and see them until tomorrow. Someone please help and share your experiences with spotting/bleeding in early pregnancy.