spotting for last 3 weeks, every 3/4 days, now 13.5 weeks preg

Has anyone had bright red blood spotting, just once when you wipe, about 1 or 2 tsp of it?  I started at 11.5 weeks on the Friday, then Sunday, then Friday, then Monday and now today, Thursday. It is always the same amount. Nothing ever changes about it.  

Ultrasound is fine, cervix lenght is 35mm, at 20mm I would need to be stitched, as per my doctor. He may even do it sooner. We are taking a wait and see approach right now. He will check me every MOnday night now.  But I'm still confused because he has no answers for me.

Anyone have this kind of bleeding at 11, 12 and 13 weeks?

[Future mom]

I started spotting at 11 weeks. I went for an ultrasound and everything was fine. I then spotted again like a week later on a Thursday, the following Sunday and Tuesday. Then I had no spotting for about a week then had some more yesterday (Monday) and some more today. It is always just a tiny bit when I first get up in the morning and is gone by the time I am ready to leave for work. I have not been back to the doctor - he said not to worry unless it gets heavier or I have cramping with it. Easy for him to say not to worry!! I go back to the doctor next Monday and am very nervous. I'm glad to hear there are other people who are going through this and everything is normal. I will be 14 weeks in 2 days.