Hi there. I have only just seen this hence the lateness! Trouble swallowing was my very first symptom of GERD. I stayed with just that symptom for about a year. It then got gradually worse and other symptoms made themselves apparent (like chest pressure, heartburn, asthma, burning throat). Get yourself checked out as soon as possible 'cos I suffered for years not knowing what was wrong with me.
Let us know how you get on!