Frankly, you don't seem to be having too many options.
What can you do?
Shoot down drones? That will declaration of war upon the sole superpower and that too when it has hundreds of troops in your backyard.
Cut-off supplies? That will cut the umbilical cord of money and weapons that feed your army and its Jarnails. Besides, the Americans have their backup plans in place.
I honestly do not see much that you can do if Uncle Sam decides to take things to the next level.
If americans set foot on FATA and our army chooses to retaliates well then i guess it would be full fledge war and owing to our lack of long range nuclear delivery vehicles we would be the losers.
I don't think so. Currently US is having serious economic crises, it's debt has equal it's GDP, companies are closing & alot of jobless people are there in US, poverty is increasing. So today Americans are eager to hear anything related to jobs creation instead of opening a new war front & that also with a massive military power. It will not only be a political suicide but like US will hit its own foot by loosing more billions, increase of debts on US, death of soilders & most importantly US will loose it's strategic ally.
Yours POV is one of way of looking at things but if the war is serious enough and not just another walk in the park i guess opposite happening is also completely plausible.