😰 blood

I am 35 years old.  I just found out (Monday, June 13th) that I am pregnant with our 4th baby.  I am now really worried about a miscarriage.  I have had 2 in the past year.  I have a very small amount of blood in my undies and a very small amount on my toilet paper when I wipe.  It is definitely coming from the vagina.  I'm about 6 weeks so I am pretty certain that I'm too far along for it to be implantation bleeding.  Does anyone have any experience with this?  Or any other thoughts?