I am temporarily residing in a Sunni country, Jordan, and there is social pressure to attend the mosque and pray with Sunnis. I am not under duress in the sense that my life would probably not be in danger should people know that I am a Shia, and I can also pray again upon returning home. For quiet prayers such as Dhuhr and Asr, reciting the bismillah loudly would make me stick out as not a part of the congregation. Is it permissible for me to whisper the bismillah and the rest of the surahs to myself when praying with Sunnis, and do I have to repeat the prayers after?