Cigarettes are fucking harsh and disgusting compared to real snus lol.
You could get a snus with lower amount of nicotine if you're that sensitive to it; almost all cigarettes have more nicotine than a single snus portion... You probably got sick from the Camel Snus because it has additives. It's a night and day difference when comparing the garbage American brands to the Swedish ones.
You could just buy one can and see how you like it, but I'm pretty sure it'd be much better.