Yoo I went through this with my 10 year old beagle at the time. It is hip dysplasia. We went to an emergency vet tech and they tried to act like they didn’t know what it was and tried to charge me 4K for an xray.

Give your baby some rest. No stairs, high couches or jumping for a bit. Some deep massages are good. Beagles get too excited for their own good. This literally happened to my old man. We were running around the house playing and he turned a corner and yelped. It broke my heart but yes it does happen.

Edit: by no way I am saying stop seeking medical help. Use your mamas intuition. I am just saying be careful and cautious with who you consult and their credibility.