Coconut oil is very anti-bacterial, anti-viral, and anti-fungal. If you're not used to taking coconut oil by itself, it definitely is normal that your tummy will feel weird because there is a likelihood that it's causing a die-off reaction.
It's usually recommended to start with small amounts of VCO and work your way up to a tbsp. at a time. It's not necessary but is useful to avoid the tummy feeling. I take tbsps of coconut oil at a time and feel fine. I've even done a cleanse a couple times where you eat 2 tbsp of VCO every two hours. Now THAT feels like hell.
I never know what to put in these things. I write songs!