Should I stop Lexapro

Hello,

My doctor prescribed me 5 mg of Lexapro and I've been taking it for 2 weeks. I'm pretty sure it's causing suicidal thoughts ; this happened on a different dose of Lexapro last year but at the time I didn't think the two were linked. Things have and were generally just crud... Anywho? Is it OK for me to stop taking the lexapro?