Rabbi, sometimes when I pray I feel sick. When I wrap Tefillin or pray Shemoneh Esrei I can get this weird feel of nausea which almost always brings me to my knees. I am never afraid, it doesn't feel like that. It just feels as if something is trying to keep me from praying. It goes away when I stop, and when I say the Shema. It comes back when I start again praying again. It has never kept me from finishing my prayers. I am just curious as to what HaShem means by this. Also I am days away from conversion. (Not sure if that may have something to do with it) I hope to hear from you soon, thank you very much Rabbi Alon Anava. May HaShem bless you.