I'm currently using Alysena 28 as a form of birth control. It is a monophasic pill, and contains 21 active pills and 7 sugar pills. I've been using it for 5 months now and take it at the same time every day, and have never missed an active pill. However, I get migraines (without aura) and am easily affected by hormonal changes, and thus I find the transition from the end of the sugar pill week to new active pills hard. Normally, on the 1st day of a new pack after taking the sugar pills for 7 days, I start to get a migraine and can become fairly nauseous. For the last 2 cycles, I've been taking the 21 active pills religiously, but have only been taking 3-4 of the sugar pills instead of the 7. Instead of taking the last few pills of the sugar pills, I've been throwing them out and instead starting a new pack a few days early. For some reason, this has helped my migraines/headaches. I've tried to run packs together (no placebo week) but have a LOT of breakthrough bleeding. Other than this small flaw, the pill has had no other side effects for me.

However, is this safe? Can I shorten my sugar pill week without fear of pregnancy/other health risks? I plan on talking to a doctor very soon about this, but would just like to know if I'm at risk.
Thank you so much!