Yes! Why put in so much time and effort for something you don't enjoy?

Hi all,
I have just joined this forum because I'm feeling extremely confused and need to talk to people who've been through the same stuff as me.

I have worked in molecular biology labs as a research technician and then as a research assistant for the past 7 years and always loved it. My current supervisor encouraged me to take on a PhD because (in her words) "it would be a waste of my talents if I didn't". I'm 6 months in and I can't seem to shake this feeling of boredom and frustration with my project. I guess its because now I'm thinking of my work in terms of a thesis and not just the 9-5 job.

Can anyone give me any ideas of how to get out of this slump?
Thanks