It typically takes about 4-6 weeks for
Zoloft to start really working. The same will apply for
dosage increases, you have to give that the same amount of time (4-6 weeks) before changes will be noticeable. That's why it's important to try to be patient, as it can take a few months to be able to FAIRLY assess a medication's effectiveness. You'll get there.
Therapy is also a good idea in addition to the medication. I would recommend that.