Normally I would say yes, they could be signs of pregnancy. But I'm wondering, if you're not expecting your period until the 26th, if you didn't just ovulate about 5 days ago? In which case you wouldn't have any symptoms yet, let alone for two weeks. UNLESS, your last period wasn't really a period and maybe you've been pregnant for an extra month! Who knows? I had a friend who had 3 periods while she was pregnant! I would say wait until closer to the 26th to test.