BFN at 18 DPO?

Hi, everyone. First time poster here, but I’ve been browsing the Glow community recently. My husband and I began TTC in September, but with irregular periods (possibly PCOS) it’s hard to get the timing right. We’ve decided not to stress about it and let it take its course, but I’m starting to get frustrated. I believe I ovulated on 10/22 based on CM and I typically feel a pinching in my ovaries when ovulating. 10/31-11/2 I had light cramping (typically very painful with AF) but no bleeding/spotting. I didn’t want to get myself worked up, so I didn’t think much about it. However, my breasts have been very sore and heavy since 10/27 to the point where it’s hard sleeping on my stomach. I typically feel like I never get enough sleep- I can sleep until 10am on my days off! But for the past week or so I’ve been waking up at 5:30 and not feeling tired. I took a First Signal test this morning (88¢ from Walmart) and got a BFN😫 I understand it takes time, but these symptoms are really confusing me? Anyone else have similar experiences? Should I test again later or wait for AF to show up?