Due my 2nd vaccine today, history of DVT, p.e etc. Not concerned about the clotting but after first dose for 2 weeks I got spontaneous hives quite severly. Can anyone advise if this is likely to get worse? Was it an allergic reaction and is it serious enough to be dangerous, in my head allergic reactions get worse? So will this be worse or more dangerous second time round? DP has anaphylaxis should I pinch one of his pens and take it with me (half joking)