Birth control.

Ok. So I’ve been on Ortho-tricyclen low for maybe almost two years. Well my doctor has recently switched me to low ogestrel. From what I know it takes atleast 7 days for the pill to become effective. I take my pills daily. 4:30 everyday to be exact. My question is, even though I switched am I or was I still protected from my last pills before my new ones had or got time to become effective? Also on a side note. I was regulated on ortho. I always started the third day of my period pill. I don’t really get period symptoms until the day I start. That’s why I’m kinda worried as today if my first day of my period pill on the new pill and I’m not sure how my period will play out. So if someone has any information on the question I asked pleeeaaasee let me know!!!