Increase in vomiting

My first trimester was a bit of a breeze really, I vomited only a couple of times and felt sick sometimes but nothing I couldn't handle.
 Now second trimester (nearly 19 weeks) I am getting a sudden urge to vomit more frequently and I empty my whole stomach contents.. Sorry for the TMI. Has anyone experienced this or am I a lucky one where sickness increases second trimester :-)