Is it necessary to protect myself after changing Logest tablets to Ellie?

Hello. I took Logest (the first two days at 9 consecutive days at 3 p.m. and by the end of the blister at 6 p.m.) because of the work, but there was no relationship this month. There were spottings from the first days until the withdrawal break. I went to the doctor, changed to Ellie and ordered to take from the 6th day of withdrawal. That's what I did. At the third tablet there was a relationship (I take this blister at a fixed time) and I wonder, because I read that after changing the tablets should be additionally protected. Should I take the tablet after? And do you normally continue with the tablets after it? And whether they protect normally or until the end of the blister I have to additionally protect myself. Thank you