Short Luteal Phase🤨

This was my first month charting and my first month actually ttc. We have been not preventing for over a year and nothing happened and we decided to get a little more involved. I read Taking Charge of your Fertility page by page and it mentions multiple times your luteal phase needs to be at least 10 days for implantation to take place, 10-12 days is still considered short and this month I discovered mine is only 9 days. Anyone else chart or just know that they have a short luteal phase? What can you do about it?

Edit: the beginning of my cycle was charted on a different paper but the thermometer wasn’t working correctly and kept giving me wild temps. I removed different things and it wasn’t changing so I threw it out and got a more accurate basal body thermometer.