Mild cramping and pressure

Hi all! I have PCOS with mostly regular periods( the days in between vary but I get one every month. I’m 7-9 dpo and am having very mild cramping in the front of my lower abdomen with a slight pressure like I have a full bladder. Normally my cramps come about 2 days before AF and are generally in my lower back. Could this be implantation? If so would it be too early to test? I’m not sure what day AF is supposed to start but I should have at least 4 or 5 more days until she’s supposed to arrive. Also I can smell blood and my nose has been running and my throat is a little sore. TIA