I get weird side effects from all meds. So this isn't common at all, but I got blurred vision from lamictal, to the point that I couldn't continue taking it because I couldn't see my computer or read.

Lithium has a lot of side effects but I'm not sure they would appear at such a low dose. You will probably find yourself very thirsty though. Make sure you're drinking a lot of water. Try not to drink juice or soda because you'll end up gaining weight from all the empty calories.

Good luck! I hope your lamictal titration goes well. Did she say why she started two mood stabilizers at once?