Online ovulation calculators are not accurate. Unless you track ovulation using basal temperature for at least 6 months, you will no know exactly when you ovulate. The ovulation calculators online, and the apps, are worthless. They're at best a guess.
Wait until your period is at least 2 weeks late, then test using first morning urine. If that test is negative, wait for your next period, and if it's late as well, test again or get a blood test done.
We really can't tell you if the bleeding you had was your period, or something else, that's not within our power online, but no, alcohol will not bring on an early period.
Good luck.
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