Advice

Hey, so I haven't been diagnosed with PCOS I haven't been to the doc or anything (will make an appt ASAP) but I'm worried I might have it. My periods are always late, I'm not ttc but whenever I've had unprotected sex I have never got pregnant and I have noticed a slight weight gain recently, it's just starting to get me down.. Does this sound like PCOS? I'm new to this, not sure if it's genetic but my family have never been diagnosed? Thanks in advance 😊