Can I do this on my own?

Super proud of myself. I was able to determine my fertile window with no opks, no apps, just looking at the signs. Increased libido and CM changed. The apps are wrong because i had a weird month last month and cant rely on them anymore sadly. I stopped the opks because it was way too stressful. Basically this is a "trust my body" month. Just listen to what my body is telling me, no help from anything and trust that it knows what it's doing. It's not that I think it will work it's simply I need to let go of the stress and this is my way of doing it