☹️ Any advice?

I am a high risk pregnancy. This is our fourth pregnancy but no actual babies. Yesterday I had a scan, measuring 5 weeks 5 days, but today I wiped when I went to the toilet and I had like a stringy bit of very dark brown discharge once. It wasn’t a lot and I haven’t had anything since - but I’m seriously fucking worried - any advice or experience ladies?

I am on daily injections of Clexane and dispersal aspirin too.