Is this my period or spotting??

Jessica • Taurus♉️🤘🏽😛
So I had unprotected sex a few weeks ago and I'm afraid that I might be pregnant.
Now is about the usual time I would start my period. I felt light cramps but not like usual because they don't even hurt at all. I felt like my period started but what came out was actually more clear liquid rather than blood and I usually have more of a heavier flow. Is there a way to tell the difference?
*update* I started my period yesterday 😌😌😊😏