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You have already suffered the HP on your report. So asking for a higher CL is not going to hurt you at all. Give them a call and ask!!
I would tend to disagree.
By asking for a higher credit limit, you have intiated a request for credit, which gives rise to their ability to again pull your CR as a new hard inquiry.
They may rely on their prior inquiry, but can pull anew.
They have just completed a determination of appropriate credit. If nothing has changed, their determination of the appropriate CL will most likely not change.
I would give it some time, and simply manage your % util against your CLs If you maintain % util the same, an increased CL wont add to your score.
Just carry lower balances for awhile, and show effective use of the account.