Long menses after stopping the pill, is this normal?

Patient: Hi…i started the YASMIN for the first time and on the first day of my menses as per instructed by my GP. But apparently as Im so not used to taking the pill yet…I didnt really followed religiously(not same time everyday). And being not determined enough, I stop after the 11th pill. I usually will hv my mense for abt 7days but now on day 15th Im still spotting…is this normal??