Spotting 18 weeks pregnant 🫡

Hi everyone! 👋🏻 I've been experiencing light, brown spotting for about 3 days this week. It started as a small stain in my undies around the side of a 2p coin, then for the last few days it's been less and less. I don't have any pains out of the ordinary.

I actually experience a similar symptom when I was 11 weeks and it turned out to be ok. I think that's what is putting me off going to hospital/GP.

Has anyone else experienced this?? What should I be looking for? What should I do? My thoughts are: If this continues until tomorrow I will definitely call hospital gynecology department...