Hi, I Am Perth Australia. Last Week I Removed 2

Hi, I am perth Australia. Last week I removed 2 ticks from by body when we're camping. I have developed upto 50 welts over my body. Adomen, legs and feet. How should I treat them and how long will they last. They are itchy and sore to torch. At this stage I am taking a antihestomine but they make feel drowsy even though that packet said they are non drowsy.