DD1 & DS both had that while I was pg with DD3. I was well into my second tri though.
I'd just pay attention how you're feeling. My kids got it from a friends DS. I didn't get it, but she did. It really knocked her around. It hits alot harder in adults. Bad headaches, aching joints, fever. She had a really hard time. If you start showing symptoms I'd get checked out.
hopefully everything will be fine. Keep the panadol & nurofen up to him xx