pregnant? flu?

Hi ladies,

I've had this weird feeling in my stomach and nausea for about 3 weeks now (exactly like the feeling I had when I was pregnant). Since we're not actively trying for a 2nd baby right now, I couldn't stop thinking about whether it could be...

Then I got my period shortly after, so that feeling went away again.
But since this morning, I've been feeling really nauseous again.
What do you guys think? Would you wait a bit or take a test?
Or could it just be the start of a little flu or something...

Thanks in advance.
Love