I too am feeling ashamed that you are a Pakistani.
I can understand that selflessness is a commendable trait but I am reminded of how it hasn't served Pakistan well.
We've selflessly sheltered Afghan refugees for the past 3 decades only to wake up to the realization that in this world, the bond of being Muslim is among the most weakest of associations. Pakistan's national interests do not allow her the luxury of extending unbridled financial support to the Rohingyas. As a nation we offer our sympathies and the little help that we can. We are not the champions of the rights of Muslims everywhere. That would be Saudi Arabia, the exporter of the Islamic faith.
We are ajamis who have adopted the faith only to find that it comes with a host of sectarian fault-lines which Saudi Arabia has failed to control. As a matter of fact we have also inherited an ideological war which we have only barely now contained on our soil, which has effectively torn the middle east to shreds. As a Muslim-majority nation we have suffered a great deal and have also been ashamed to learn that our Arab "brother" states have selfishly watched our agony from the sidelines and, on multiple, occasions refused to offer remedial assistance. Despite their vast amount of wealth Pakistan has received little benefit from them whereas we have had to repeatedly bend over backwards to accommodate their problems.
I think it is time we called the spade for what it is.
I was overly joyed when the Parliament decided not to accept Saudi's call for a military campaign in Yemen. The Arabs don't know what they're doing (as is undoubtedly explicit from the condition of their kingdoms and states) and they are taking all the world's Muslims down with them. The Muslim countries who are not participating in the bloodshed (and the hopelessly mangled pan-Islamic politics) also happen to be the states which are amongst the most prosperous and the most progressive i.e Turkey, Indonesia, Malaysia.
Please rid yourself of the notion that it is our Islamic duty to help the Rohingyas. It is not. As fellow human beings we offer them what little help we can.