Ring the consultant's secretary, your gp, or ask the pharmacist, they will be able to tell you how long is too long.
I was diagnosed with silent reflux during covid, well slightly after when we started to be able to have appointments again.
It started during lockdown and as i couldn't be seen by my gp during this time my anxiety was really bad, thinking the worst, but once I was diagnosed, and after a while my symptoms started improving, where now, the only time I get a sore throat is when I've eaten too much chocolate. Anxiety made it much more worse.
I cut out everything that makes it worse and gradually brought it back to see what foods and drinks affected me.
I took gaviscon advance for a while, but stopped as it's not good to take long term.