Confused

I’m really confused right I had a positive frer and clear blue digital back on 4th may had a bleed for a day 3 weeks later was still getting positive results then on 26th may I had a faint positive the on 28th may I started bleeding like a period so chemical or period is a chemical bleed a period? But rolling on to now I’ve still got all pregnancy symptoms boobs are really sore and itchy heartburn and metal taste im not sure what’s going on