What should I do if I wake up 15 minutes before sunrise and need 3 to 5 minutes for ablution; should I pray or not?

It is obligatory to promptly perform ablution and pray the Sunnah of Fajr and the Fard prayer as long as there is sufficient time. Whoever catches one rak'ah with its two prostrations before the time expires has caught the prayer as adaa' (performance within its prescribed time). There is disagreement regarding the validity of one who catches less than that. It is important to emphasize the obligation of taking measures to help oneself wake up for prayer.