Random Spotting

Hey ladies. So I've been on the pill for 7 months now and sexually active with the same partner. This last packet, I switched from 2pm to 7am during the sugar pills to help with my work schedule. 8 days into this new packet, I have been spotting heavily. I'm started to get concerned but I'm curious if it's the time switch? I've never missed a pill and haven't spotted since the first initial bc packet.

-C