If I don't show any signs of alcohol withdrawal in 7 days of not drinking am I ever going to have withdrawal?

No. If you have gone 7 days from last drink and have no withdrawal symptoms you are free of concerns regarding physical dependence. However psychological depence and cravings may remain.
Possibly. Depends on how much you were drinking and for how long. Severe withdrawal is most likely 5-7 days after cessation, but it may take up to 10 days to get severe withdrawal symptoms. You need to get help through a substance abuse program.