I unintentionally missed maghrib as I am secretly following Islam and I can not do it due to my family and extensive work so I joined isha with maghrib have I done a sin please reply I am crying!!
Assalmu Alaikum Warahmatullahi Warbarakatuh,
Firstly a very warm welcome to Islam, May Allah Ta'ala continue to help and strenghten you all the way to jannatul fidous. And guide the rest of your family with His endless nur (light) too, Ameen x
Maybe this is a very late reply, but i just came across this website today. So here goes, It comes in the Hadith in Sahih Al Bukhari Shareef: On the authority of Anas (RA)that Our Beloved Prophet Muhammed (SAW) said:" If anyone forgets their Salah, then he should pray it when he remembers, there is no expiation, except to pray the same."
So in your case you would just read your 3 Fardh of Maghrib of Qadha (meaning the missed Salah). and You can pray this this 3 Fardh of Maghrib Salah that you have missed before or after your Isha Salah.
Remember even when you sin, always ask Allah The Most High, for forgiveness, He is always with us and the Most forgiving, Never lose hope in Allah. Our beloved prophet (SAW) says "The one who repents from his sins is the like the one who has no sin"
May Safeguard all our imaans and Forgive us all, Ameen
And Allah knows best
Combining Zuhr+Asr or Maghrib+Isha is allowed under certain circumstances, not sure if your case is one of them. Here is a link describing the issue (http://www.islamweb.net/en/article/85574/combining-two-prayers)
I ask Allah to help you and to give you the strength to continue practicing Islam.