Any SSRI will take anything uo to 3 months to fully start to have consistent effects. In the first few weeks side effects can be severe but you have to stick with them at least 3 months...even small doses can have drastic effects on some people similar to what large doses may do to other people.
After they get fully in your system a gradual cha ge to a different type shouldnt be to harsh if needed.
Excersise...less alcohol...good food...practice well being and cbt all help and in my opinion should be used first.
SSRIs can drag you down before they build you up.
As for the poster waiting for cbt...see in "minds matter" is available by referral in your area.