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When I was 11 years old I guess I doubted Islam as i heard that Islam allows slavery and orders to execute the apostates etc. at that time I went so crazy that I started flipping coins for example I thought that if it lands heads Islam is the true religion and I tails Christianity is I asked god to show me a sign at that time I did not kin what shirk was and I got satanic whispers which led me too this but I always supported Islam and kept telling myself that there is a reason . When I flipped the coin I said o Allah I know Islam is the true religion please show me a sign but then I said Christian god if your religion is true May it land tails. After Lala that I realized that Islam is the truth and I became a Muslim again as I began to pray but now I'm 13 years old and I fear that I committed shirk that time as now I learned about shirk but when I flipped the coin I only said so e word I never believed that the Christian god is real I just said those word as shay tan misguided me I did not pray or worship the god or anything but I think I invoked him which is shirk I just want to know is that invoking without actually believing is it shirk I can't continue with my life anymore as I am really scared and I can't leave this sin behind me I think about it every second of my life almost I can't continue with my life please tell me if this is shirk.