We are truly sorry to hear about the unbearable pain you're experiencing post-surgery, and we're here to pray and offer some biblical encouragement. It is good that you acknowledge the name of Jesus in your request never be afraid to come just as you are.
Firstly, let's remember God's promise in Psalm 50:15, Call on me in the day of trouble. I will deliver you, and you will honor me. WEB. God is always there to help us in our times of need, and he hears your cries.
Regarding the pain and sleepless nights, let's pray according to God's word in Psalm 4:8, In peace I will both lay me down and sleep, for you, Lord, alone make me live in safety. WEB. We trust that God will grant you peaceful sleep and relieve your pain.
However, we must also address your feelings of being forsaken. We are assured in Hebrews 13:5, Be content with such things as you have. For he has said, I will in no way leave you, neither will I in any way forsake you. WEB. Remember that God is always with you, even in your darkest hours. It must be pointed out that the thought to take your life is actually a temptation from the enemy. Taking your own life is very different from simply desiring healing and God solving your problems. It is a permanent solution to a temporary problem. God will help you overcome this time in your life. He will bring you into a better future. This problem can go away. Suicide goes against God's will for us and does not give him a chance to help us. Jesus came so we can have life and have it more abundantly, John 10:10b. Also, it will deny God's work to complete you as it says in Phillipians 1:6.
Now, let's join our faith together and pray for your healing.
Dear Heavenly Father,
We come before you today, lifting up our dear ### who is going through immense pain following leg surgery. We ask that you forgive their sins, as they have cried out to you, and grant them your peace. Lord, touch their leg with your mighty healing hand, and cure them. We stand against any attacks of the enemy on their mental, physical, and spiritual health in the name of Jesus. We pray for their complete healing and ask you, Lord, remind ### that you will not leave or forsake them in Jesus Christ's name we ask these things.
And we pray Amen.
May we encourage you to use our current medication to help alleviate these pains until we feel God's touch.
While you wait for God's healing, may we also encourage you to meditate on God's word, and listen to praise songs, singles and albums every chance you get. Spend time with other Christians, read Christian articles, online or in magazines, watch or listen to testimonies and sermons on YouTube. In this way you will provide unity for the Holy Spirit to come into your situation and culture an Atmosphere of heaven. Which may be needed to help you find your own direction and healing. With these scriptures, songs, sermons, and prayer you lean into God. Remember the word of God is medicine for your health, body and spirit.. Don't give up hope, for God is faithful. Remember, The LORD is close to the brokenhearted, and saves those who are crushed in spirit. Psalm 34:18. WE and IJN.
Prayer Focus: God, Thank You for loving me. Thank You for loving me, Jesus. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, soul, mind, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
