Spotting

Hi, 
I started Lomedia about 3 weeks ago and two weeks into the pill I started spotting. This lasted about 6 days. Before starting the pill I was having a period every two weeks & the day I started spotting is the day I would have been due for my period according to my
previous cycle. I'm not sure if I should could that as my period or not or if it was just spotting because now I'm two days before my placebo pills and I'm spotting again! Someone please tell me this is normal. Thanks!