Can I pray ishaa sunna after fajr
You cannot pray Isha Sunnah prayers after Fajr. This is because this prayer is only supposed to be said at its expected time and not after because time passed for this prayer cannot be made up. Read more on http://salaf-us-saalih.com/2012/08/18/sunnah-prayers-explained-shaykh-bin-baz-rahimahullaah-must-read/.
the best reply could be that you should ask your priest