Hello I am Dr. Joey. Thanks for trusting me to help you and your pet today. I am a licensed veterinarian with over 16 years of experience. I look forward to working with you.
Given her age, indications to have her seen on emergency today would be if her agitation and cough continues or if she develops new symptoms such as vomiting, diarrhea, true difficulty breathing (or her gum color is not a normal pink but is white/pale or yellow), or abdominal/stomach pain.
If she seems to have recovered to normal, then I would recommend monitor her for a while and see if her symptoms recur.
With the coughing fit, I do want to be sure it was truly coughing and not a reverse sneeze which indicates agitation in the back of the throat, and is common in beagles but not a medical emergency. Here is a link that can show you what a reverse sneeze looks like if you are unsure: CLICK HERE
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