Thanks for your question on Healthcare Magic.
I can understand your concern.
Yes, you should definitely bother for this chronic neck swelling.
Possibility of cervical lymphnode enlargement is more in your case.
You are having this since 3 months. So possibility of chronic infection like tubercular or fungal
Lymphadenopathy is more.
And in these kind of chronic infections, menstrual irregularities are common.
So better to get done
ultrasound examination of neck to find out the size of swelling.
You will also need fine needle aspiration cytology (FNAC) to identify the cause for this.
You will need anti tubercular or anti fungal drugs on the basis of FNAC report.
Don't worry, you will be alright with treatment.
Hope I have solved your query. I will be happy to help you further. Wish you good health. Thanks.