Try to just keep things in perspective. The fact that you tanned does NOT mean you will get skin cancer/melanoma. Even an atypical mole does NOT mean that it will eventually turn to cancer.
Just continue to be diligent with your own self exams and note anything suspicious and keep an eye on it if your find something. The main thing to note is changes in appearance, shape, size, etc...
Skin cancer is scary - there is no doubt about that. But relax - the time you spent tanning cannot be reversed - it can only be controlled now.
And you are doing that by being aware and watching your skin. I am glad to hear that your mole is clear.
That is good news.
Wishing you the best.