Extended period.

Hey ladies, So last weekend I had unprotected sex on my period but I wasn’t bleeding so it was fine just dry(smh). Anyways I’ve been bleeding for like 10day my period is usually 1 week or 5 days but never this long. It’s more like extended spotting. Is this normal, I’m 21 and have never experienced anything like this only when I got off the depo shot a few years ago but not recently. Could there be a issue or what? Should I go to the gyno or is this ok. Has this happened to you? Let me know Ladies