Period or More PP Bleeding

Kirston
So I gave birth to twins 6 weeks ago. I bled for about 3 1/2-4 weeks and I stopped bleeding for a week and I started spotting on the 11th of this month when I went to the doctors and the on the 13th it started really heavy and has been heavy ever since then. Has anybody had this problem? Is this my period? How long did it last for u?