There a little smoke coming from my exhaust which smells sweet. Am I looking at a head gasket replacement here?

I was meant to take a 800mile road trip but i'm a little bit concerned about this smoke. It occurs mostly when i first start up but seem fine after that. However I'm very scared of long trips since my engine broke two months ago with a failed intake manifold diaphram letting oil into the engine. Could this be the signs of my Nikasil engine on its way out?