Haven’t had a period in almost 4 months.

Haven’t had a period in 110 days almost 4 months. I only work part time and do not have insurance. Can’t afford to go to the doctor right now. It’s so frustrating cause I truly believe something is wrong and I need to get checked out Incase it’s something serious. Even before my periods stopped I had irregular ones ranging from 35 to 52 day cycles. I have other symptoms other than missed periods. I just don’t have the money or resources to check it out. Have any of you gone months without a period? Was it a hormone imbalance or something more serious?