A sleep study is the way to go. If it turns out you have actual sleep apnea, a cpap machine is likely the only thing that will work short of surgery, which is only sometimes effective. Losing weight will often help alleviate but not completely resolve sleep apnea. Having undiagnosed sleep apnea is dangerous since it affects your heart, often your blood sugar, and has a host of other mortality risks. If it is simple snoring and not apnea, breath right strips will help, as will adjusting sleeping positions, some pillows, and several other nasal breathing aids you can find on Amazon.