Morning sickness/nausea

I was completely in the clear or so I thought..I hadn't felt really sick at all until I hit about week 10 and ever since then I feel nauseous about every other day or so and its the worst! Has anyone else experienced this? I almost feel like it's going to continue into my second trimester (I hit 12 weeks on Thursday 3/24/16) I sure hope not though! Ps- this is my first pregnancy. :)