So, you are never supposed to stop an antidepressant cold turkey. You were on a lower dose so it may have worked out for you but those medications need to be tapered down with decreasing doses over time. The general rule of thumb is that antidepressants take 6 to 8 weeks to reach full therapeutic effect and can have start up side effects in the beginning. You are feeling bad but it has been a short time.
Also, something to remember is that SSRI's and these medications are helpers. They do not completely alleviate anxiety all together. They take the edge off and make it so you can cope but you will still have some anxiety where it would make sense for what is going on in your life. Are you having some things going on in life that are leading to this more anxious state?
Yes, terrific that you are starting therapy on MOnday! I am sure this will all combine to help you or at least you will be working with those who can give you next step ideas if what you are currently doing doesn't help. Let us know how therapy goes Monday or if you need to talk before then, we are here.