As title says 2nd AZ jab 8am Friday since mid afternoon Friday I’ve had the worst migraine/headache I’ve ever experienced. I can barely lift my head off the pillow because of the pain, vomiting and head feels like someone has taken a hammer to the back and top of my head continuously. I also have neck pain and a bit of neck stiffness, I am worried about blood clots but everything online says the headache for that starts after 4 days. I have taken 2 30mg codiene 500mg paracetamol prescriptions tablets every 4 hours and they are not touching it.