Lamictal/Rash & Sweat ?

I have been taking lamictal (without any other medications) for about 2 years, I started treatment of epilepsy since 1999 with Depakine, I changed to lamictal 4 years ago ; by withdrawing depakine gradually, now I am taking 300 mg lamictal per day. I didn't have any seizures since 2002 (but I have to stick to treatment to avoid seizures), & I didn't had any side effects, I felt great, but now, I started to notice some things I don't know if they are lamictal side effects or not : The first thing : for 2 or 3 days now, I wake up in the morning & I find some red spots on my body (my legs & my arms); when I checked the lamictal rash pictures, I found it similar, but it is strange that after 2 or 3 hours from waking up, the rash completely disappear, & so on. The second thing is that I sweat too much without reasons, not at a specific time, but whenever I go out, I find my body sweating very fastly specially my under arms, which made me feels very embarrassed & the sweat has a detected odor. I am confused, do these things have a relation to each other ? Can I have side effects of lamictal after 4 years of taking it without any side effects during this whole period ? Can anyone give me help or advice pls ? thanks