Hello Ms. Kirsty,
The lump you are feeling is perhaps a mucosal patch or some granulation tissue secondary to the infection you had. You should see an ENT specialist
to locate the cause. Most often, as you vomit, with retching
, mucosal lining of the pharynx gets torn and as it heals you get the feeling of a lump in the throat and also blood stain in the vomitus. This will subside as the mucosa heals but any granulation tissue if causing trouble may need a cauterization
. Please consult your doctor for further guidance. Good luck.