2 periods 1 month ?

Hi ladies ... Wondering if anyone has gone through the same or Similar situation. My last (normal) period was on the 4th-8th September. However , I then had a bleed on the 1st October and went on until the 4th October. I have them had another bleed on the 26th October until the 30th October. ? Just wondering if this is normal or if anyone can give me some answers. My periods are regular I have never missed a month and normally every 28 days. If someone could please help. Thank you x