I'm a low hours PPL student like yourself and I was thinking of posting the exact same thread when I got back from today's lesson.
We were flying at 2,000ft today due to cloud cover and there was a lot of turbulence. I spent the entire 75 minute flight being bumped about and not only that but we did the "slow flight" exercise followed by some co-ordinated turns. Sudden gusts really put me off balance and I do find my nerves getting the better of me. My hands were slipping on the controls towards the end from the sweat and being rocked about for so long made me feel queezy for the first time since I started my training. That all had a knock-on effect on my flying especially once we entered the circuit.
My instructor assures me that everyone gets affected by nerves and that they quickly fade as your confidence grows. Despite having many hundreds of hours he seems nervous himself at times, especially when there's traffic about... or when I'm in control
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Some nervousness can only be a good thing as it keeps you on your toes. When you get complacent you might let a 'situation' develop without realising.