Struggling with Iman, Need Your Support and Duas

Salam everyone, I'm an adult guy, born into a Muslim family, and lately I've been really struggling with my faith. It's on my mind all the time. Alhamdulillah, I do pray all five daily prayers, I give zakah from what I've saved up since I don't have a regular income, and I fast both the obligatory ones and many of the recommended ones. But still, my heart feels heavy, and my iman feels weak. Staying away from haram relationships has been tough, but by Allah's grace, I've managed to avoid them. I've never touched alcohol or drugs either. I'm trying to cut out music from my life, and I'm working on removing pornography completely. I try to stay away from sins because the guilt is real, but sometimes I wonder: am I doing this because I truly believe in the akhirah, or just because sins feel wrong and avoiding them makes me feel good? Let me share why I avoid certain things: 1) I never miss my prayers because if I do, especially Fajr, I feel a deep guilt and emptiness. It's like I'm drifting from Allah. Same goes for fasting. 2) I don't get into relationships outside of marriage because Allah says that good women are for good men, and those involved in haram relationships may not be the good ones. Honestly, I wouldn't want a wife with a past, and if I engage in dating now, I fear Allah might let me end up with such a spouse, which I really don't want. 3) I rarely listen to music now; whenever I do, guilt hits me, and I switch to listening to the Quran instead. Even though I avoid these sins, I still get scary thoughts: what if I die and all this was for nothing? Recently, I thought about how Muslims in my country, Bangladesh, live in some of the harshest conditions, while Gulf Arabs, also Muslim, enjoy so much luxury in this world. Will their tests in the hereafter really be the same? I know Allah is Al-Adl, the Most Just, and the Quran says no soul will be wronged-I've read the English translation and cried at many verses-but it's still hard to imagine how judgment day will work. The idea of shirk, associating partners with Allah, feels like the worst thing ever to me, and my fear of the consequences keeps me from many sins. Yet, sometimes I can't stop the thought: what if I won't be resurrected? I'm scared that maybe I'm only a Muslim because Islam prohibits many things I dislike in this world, and because being Muslim gives me a sense of goodness. I keep asking Allah to strengthen my iman, but even when I say the shahada, I feel a bit empty inside. Please help me with your advice and duas-I don't want to meet my end as a disbeliever.