I finished my packet of pills (mercillon) last Friday and so far, have had no withdrawal bleed. I only went back on the pill two months ago, after having dd last year, and had a bleed as normal after the first packet. I was on it for years with no problems before that. I have done a pg test today which was neg but should I be worried about the lack of bleeding and do I need to see someone about it? any advice? TIA!