Any advice? 10DPO Implementation?

So… I had two periods in September, the last one ending on the 26th September. I tested for Ovulation everyday using OPKS and finally got a positive on the 16th October on day 26 of my cycle which is late I know! The positive only stayed for one night and then nothing more. On this day we BDanced 💃🏻 I’m now 10DPO and have had slight spotting this morning. Could this be implementation? Also I’ve read that your body only produces HCG after implementation? Is this right? 🙏🏼🙏🏼