33 weeks pregnant an throwing up...

So I'll be 33 weeks tomorrow and out of no where today I threw up.... I was doing dishes got a wicked hot flash an had to run to the bathroom to make it before I threw up. I had extremely bad morning sickness for the first 15 weeks of pregnancy and then it stopped an I've been fine since then. Is this normal to have this happen or is it something I should tell my doctor about?