Yes. You have a strong prescription. If you want to get a regular plastic lens, then your lens would be thick with a strong prescription. However, you can get high index for your lens which will make your lens much thinner. For high index, the stronger the prescription is, the thinner the lens will be. So I recommend you get the high index for your lenses.
It should depend on which lens index you choose. If you choose the standard 1.5 index, of course your glasses will be very thick. But if you choose 1.67 index, it can be much thinner. But the thinner the lens is, the more expensive they are.