Spotting brown at 4weeks 3days pregnant

I just found out I was pregnant yesterday I didn’t believe it since Ive been trying for 2+ yrs, so I went out and bought more test and even called my doctor to make an appointment, I also have a bit of cramps and some brown spotting which I told the doctor and she said she wasn’t worried unless it’s heavy and red... but today I’m spotting a bit more brown than yesterday I’m highly concern I had my husband buy another test and it’s still positive but I’m scared because I’ve had a miscarriage in the past and then since been having a hard time to get pregnant til now... any advice til my doctor sees me in OCTOBER

IM READY TO GO TO THE ER BUT I DONT WANNA OVER REACT, but I’m still scared