Question about nodule

I have many medical problems..I just had a pelvic ct scan with and without contrast. They found a 5 mm non-calcified nodule in my lung. Right side. My doctor says I should  not be concerned with it. My husband and I are freaked out. Any ideas? My dr did say he would send me again for a scan in 3 mons instead of 6 mons lessening the stress..He also wanted me tocompare a previus xray to the ct scan. I took the scans to the radiologist and they saidthat it would be better to get a ct of mt chest only. So I left him a message. However, I am still freaked out.. Have anyideas? We have a PPO so I can see anyone without a referral, who would I see next?