Hi. My Name Is Lorraine. Since September My Right Side

Hi. My name is Lorraine. Since September my right side of my neck keeps swelling up but it happens every 5 weeks since September till now and it it sore and very hard when pressed on. One doctor said it was swollen gland. Another doctor said it was lymph mode, but I am bit nervous as second doctor said he wanted me to return next week if it hasn't gone to do blood tests as it hasn't gone yet. Can you tell me what it is.