Need advice on early pregnancy

I have had two previous miscarriages in the past. One being 8 weeks pregnant (not knowing) other one being a chemical pregnancy at 6 weeks. I'm not on any contraception at the minute as I want this to happen when the time is right. My period was 3 days late with all pregnancy tests being negative recently. But this morning I have had light bleeding. Should I test again or is this my period. So confused. All advice welcome:)