If you can't stop thinking about it then start praying for it as much as you want it. Allah is Al-Wahhab, The Giver of Gifts. He wants to give but you have to ask. Allah is Al-Mujeeb, The One Who Answers Prayers. Allah guides you to make Du'a because He wants to answer it.
Tahajjud is the solution for every problem to exist. Start praying tahajjud and keep asking Allah what you need. You will see your duas will be accepted. Tahajjud is an opportunity to talk to the best listener.
You read Surah Maryam and you see how Allah literally made miracles happen just because of a Dua. Never give up on your dua, on asking Him for something that seems impossible to you, your miracle might be just one dua away.
If Allah wants you to pray Fajr, He will wake you up and make you leave your bed no matter what. He will create situations that compel you to leave your bed, and eventually, you will pray Fajr. That's Allah's love for you. Have Taqwa, and Allah will take care of the rest!
Tahajjud prayer is like a sweet addiction, once you start and understand it's sweetness, you cannot live without it, it becomes a part of your daily life, And the fact that Allah makes you addicted to speaking to Him in the middle of the night is a blessing itself.