Spotting after positive 13dpo

I'm 13dpo got my positive today. I had multiple faint positives but nothing dark enough to confirm. I got that today on 3 different test. Now I'm bleeding. It's pink and light but my periods also start out pinkish red and light. Period is due to start tomorrow. I'm starting to freak out because of my past history with miscarriages. Is this a chemical or normal spotting?