Confused.... Need help please

Okay here's the scoop. In 24 my finance and I have been trying for a year for baby #1, hoping this is our month but not sure! I believe I O'd on the 21 and about 5 days later I woke up around 5:30 to get my loving man up for work. I was sitting there on the stairs and all the sudden I had a hot flash. And then a 2 days later I had a poking pain in my uterus. Could that be implantation??? Any opinions are welcome!!! Thank you!!