I had this exact thing 2 weeks ago! Absolutely freaked out! Went to the hospital at 11pm.. and yep ur right they dont really want to see u before 20 weeks.. all i wanted was for them to check the babies hb or do a quick u/s and they kept saying that their main concern was me.. not the baby since there is nothing they can do if i was m/c'ing.. they did bt's to see if i had lost much blood-which was so stupid cos i said that i had only noticed red blood when wiping after going to the toilet and it definitely wasnt alot. Finally after 3 hrs they got an u/s machine and checked baby.. even then they were quite rude to me tho! Gosh it might not have been an emergency to them but needing some reassurance was definitely an emergency to me!
I saw my ob. yesterday and he said its very normal to get light bleeds up until around 16-17 weeks cos everything is sticking together still etc.. but anything after then can be a bit more serious and to call him asap.. But like some of the others have said it cld be a uti or the hospital said it cld even be thrush causing it but with no other real symptoms.. or it cld just be some random thing! Who knows!

I bet u will be fine... especially since u have heard babies hb. From the stories i have heard from ppl if u are going to m/c at this stage in pg it normally happens pretty quickly.. not light spotting here and there. Im sure there are stories that are totally the opposite to this but im sticking to that!

Let us know how u go tomoro at ur gp appointment. Best of luck! xx