So I was on low dose birth control and I switched to high dose. Well this week I accidently missed 2 days on day 3 I took 2 and day 4 I took 2 to even it all out. Is it possible I could be pregnant from the switch of dosage? I think I'm having implanation bleeding too. It's a week before my period and I'm lightly bleeding with no blood clots like a normal period