Pink then brown discharge @ 8 weeks pregnant..

Hi all, so today I should roughly be around 8 wks 3 days.. This morning when I got up to use the bathroom I had pink spotting whenever I wiped. Nothing in the toilet or underware. Then when I went to the bathroom again about an hour later, it was brown. I have my first u/s appt Tuesday so am trying to hold out hope that all is ok. Any one have this or any advice ? I've had 2 mc's in the past that have all started differently so needless to say I'm trying not to think the worse but it's so hard not to :(