I did my hefsek on Thursday and am counting my 7 clean days. I did my bedikot on clean day 1 (Friday) and everything was going as usual. I kept in mind when my mikvah night will be, on Thursday night. But, for some reason on what was my clean day 2, which was Shabbos, I was thinking it was clean day 3. Then on Sunday when I was about to do my bedikah in the morning, I was thinking it was clean day 4, and then I realized that I was counting wrong and it is really clean day 3. I never lost track of the fact that my mikvah night will be Thursday, even though I started counting wrong. Is my shivah nekiim still valid?