Should I take a test or wait?

I had protected sex on the 28th, and my period was suppose to start 3 days ago according to my calendar(which for all my other periods it has been either spot on or 1-3 days off). I’m getting all my period symptoms (back pain, emotional, and headaches)but my period still hasn’t came yet. Should I take a test or wait a few more days to see? My assumption is I ovulated about 2 weeks ago, 1 based off my calendar bc it gives an idea, and 2 because that’s when I had the wetish discharge as you would when you’re ovulating so I think my chances of being preg at all r very slim but I’m still a little worried.

Wdyt?