Ginger during pregnancy?

Corrina • Mummy to a 3 year old little girl, expecting our second little girl in November '15. 🎀
I'm 7 weeks pregnant and my sickness is awful already, I don't see a midwife for another 2ish weeks and no docs available till 28th April! I've been reading up on ginger tea, just literally boiling some fresh ginger with water and a squeeze of lemon.. Is this safe?