It really depends on which plague you got.
If you were to get the BUBONIC plague, you would suffer terrible pains in your armpit and groin area. You would also get a huge fever and a terrible thirst which no amount of water could quench. As well as having a huge fever you'd also find small black spots on you arms and legs. You would die with in 4-7 days.
However, if you got the phnemonic plague, you would under go an extremely painful cough and cough up blood as well as having a large fever. You would die in about two days of catching it.There was also the black death which was when you turned the purpley blue color like when you get a bruise and your whole body got covered like that because you were bleeding under you skin. You would die in probably 1-2 days.