Ovulation

So I have irregular cycles, tried to conceive the 18th of this month and the 22nd, and today I’m having lower back pain, and cramping, but I’m not sure if I felt this during pms, sorry tmi my cm is clear, stretchy and wet but every time I took a pee stick ovulation I got faint lines all the time and then tested today with no line.. any ideas.. probably my period huh 😞 trying to get pregnant is s full time job... I don’t know what to think of this.