Which is the better drug to cope up with Pure O?

I know I won`t buy any of these drugs for myself without referring to a psychiatrist.

I would like to gather some information before having a conversation with the GP.

Here are My Problems (Yet not boring!)

Listing out each and every activity that are left over in the Do List
Feeling like forgotten something (so recalling and forgetting again, so on)

Looking at a time at crazy times an hour (checking time often)

Not satisfied, feeling unpleasant

feeling lot of pressure on the stomach (muscle twitching, tremor)

P.S: These type of crazy behaviours haven`t developed over a month or a year.

I`ve been facing trouble since age of 12 (now I`m 24)

I lost major portion of my lifetime (adolescense and childhood) on battle with the crazy OCD.

I`vebeen taking medication for over 6 months so far.

Fluoxetine - 20 mg. once a day.
but now my obsessions and compulsions are heavily relapsing!. so I need to change my drugs right now.. I hope you guys give me a better understanding about these drugs

Here are my alternatives for fluoxetine (assuming)

Inositol 18 gms
Lexapro or escitalopram oxalate (dual isometric)
Sertraline or Zoloft

so which is the right one to choose to reduce my compulsions as soon as possible?
also please tell me which one has lesser side effects?

Note: I`m not in any other medication except for anxiety disorder.
also, I didn`t had any noticeable side effects when taking fluoxetine..