Flu Jab and PD

Hi, Just a query. Had my flu jab this morning about 11am, Had my normal pd pills at 12.30 - two Co-Careldopa. I then take one Co-Careldopa at 6pm so that I can eat my tea about 7pm without throwing it around. Normally about 4.30-5pm my hand starts to go and its very difficult to work. Today, no such problem, No tremor at all, had my 6pm pill as normal, typing this at 19.45pm still no tremor. Don;t get me wroing it great but very confusing. Has anybody else had this after the flu jab.