Invitations.vacs.nhs.scot will tell you if you got anything scheduled.
There are also walk-in Centres for second vaccinations if it has been more than 8 weeks since your first one and you are aged 18 to 39. https://www.nhsggc.org.uk/your-health/health-issues/covid-19-coronavirus/for-patients-the-public/covid-vaccinations/drop-in-vaccinations/ for info