Insect Repellant during Pregnancy & Sunblock

I don't like the idea of using chemical insect repellents during pregnancy. We are at the lake almost every weekend and Mosquitos and be quite bad so I do need to use something. I'm going to ask my Dr about using the doTERRA oil blend Terrashield which is a natural insect repellant oil blend made from Lemon Oil, Eucalyptus Oil, Citronella Oil and Lemongrass Oil. Has anyone safely used the Terrashield blend while pregnant?
Also what about sunscreen?
I hate nasty chemicals.