Is a little tan or beige CM okay?

I'm 7 weeks and for the past 3 or 4 days I've had very little tan/beige little "clumps" of CM or discharge. Like it's not every time I wipe but it's atleast a couple times a day. The liquid part of the discharge isn't colored. Just the clump bits. Do you think it's just a little old blood? My first ultrasound is Wednesday so now im nervous.

Also I haven't had sex recently and my cramps have been mild if anything.

Thanks for your help.