Here's another study in case you're still worried @shivawn 
New Pfizer jab study supports Government 12-week interval, researchers claim
He added: ‘Whilst we do not know how long this immunity will last beyond 21 days without a second booster, we are unlikely to see any major decline during the following nine weeks.’
Professor Hunter told Pulse that although we can’t be ‘certain’ that immunity will not decline between 21 days and 12 weeks, immunity levels ‘don’t decrease that quickly for anything’.
He said: ‘We don’t know for certain that that will last for a very long time but with all the other information that we have about natural infection with Covid, the Oxford/AstraZeneca vaccine and vaccinations to pretty much every other viral disease that you could wish to name, [we think] that’s going to last at least six months with that sort of level and certainly it’ll last well enough to your second dose.
‘There’s been a lot of criticism of the increased gap, but very little of that criticism has come from people who work in infectious diseases.’
www.pulsetoday.co.uk/news/clinical-areas/immunology-and-vaccines/new-pfizer-jab-study-supports-government-12-week-interval-researchers-claim/?cmpredirect