SPEM(Sperm Meets Egg Plan)

So I think I might be out for the month😫Tested this morning with Clear blue Digital said Not Pregnant😭. Period supposed to come anywhere from today to the 16th.im 12DPO and on cycle day 29 ish(cycles vary from 27-30ish days give or take a couple) I've been having period like cramps this evening. Cervical position has remained super soft and super high and closed for just about everyday so far this cycle. If I get my period between now and then we are gonna try the SMEP(Sperm Meets Egg Plan). Here is what is says:

In order to ensure sperm and egg meet, you will “try” every other day starting on the eighth day of your cycle. The timing of this is based on how long sperm live, realistically a few days under ideal conditions. On the tenth day of your cycle you will begin daily testing with OPKs (ovulation prediction kits) and upon receiving a positive opk you will “try” 3 more days in a row. Skip one day and give it one more try.

When it means positive opk I'm assuming it means when it shows high fertility? I use the Clear Blue Connectivity ovulation tests. I received 5 high fertility results b fire getting my 2 peak days. We made love the day before the 1st peak day and then we made love on the last peak day.

Has anyone used this method and gotten pregnant on the first try?