Oh for crying out loud. Pakistan is a nation of ~200 million. You are definitely no Libya. Fact is Pakistan has China totally backing you up, period. Look at what we did when USA intervened in China's bordering nations like Korean War and Vietnam War. China has just finished kicking USA's arse out of South China Sea. I'd bet this is Centcom saying to Washington "look at us, we are better than Paccom, they can't deal with the Chinese in Asia Pacific, but at least we can throw our weight around in this part of the world!"
China and Russia are working hand-in-hand in sync because Putin is back and Xi Jinping turned out to be China's Putin (unlike Hu Jintao / Wen Jiabao who are like China's Medvedev or even Gorbachev). Nothing is going to happen to Pakistan strategically, although pin-pricks like this move by USS Enterprise is to be expected.
Look at Iran, they've been pin-pricked by USA for ages, but they handle themselves well. Okay, they have oil, so that's a huge advantage Pakistan doesn't have (not yet discovered at least). But at least Pakistan already has nukes. And india is completely checked by China so no need to worry about that.
You'll pull through, as long as you don't fall apart internally. You have too many allies -- China and Russia are checking USA left and right all over the world -- so they are lashing out at you in desperation. Don't freak out. Closing down the Afghanistan supply route is really hurting them badly!
If hot conflict breaks out, it will be part of a global conflagration -- not just Pakistan -- Syria will erupt, Iran will erupt and East China Sea will erupt. Pakistan definitely won't be facing USA firepower alone.