Uk europe symptoms and conditions

I was recently prescribed this drug for mild acne, no advice was given to me about the possible side effects, or how best to take it (sitting up with plenty water) - it has given me severe chest pain, I am unable to swallow, I have cramps, and my last pill was 5 days ago! I only took it for a week. I am so shocked that they dish this out with such little care, yet it such a powerful drug, used for MALARIA!!! Will I ever feel normal and be able to eat properly again?