I am 21 year old female with swollen lymph nodes in the left axillary region. It comes and goes. It started in 2018ish and prolly had once in that year then went increasingly each year. I got upto 8 of them this year from late january to late march/ early may. I researched about it but found out its less likely to be cancer since they are tender and come and go. But this time they reduced in size (but not completely gone) and can be palpated. They are not painful at right now. Should I be concerned? What could it be? What should I do? Please help.