Having brown spotting

Not enough to show up on a pad or anything just when I wipe sometimes, I'm very early into this pregnancy and I've had a miscarriage before so it kind of scares me, my levels were at 100 last week and they said it's just extremely early too early to even see anything on an ultrasound, And that it was normal as long as it's not bright red or any bad cramping, anyone else experiencing this as well? Also I have a tilted uterus to the left!