Early labor?

How will I know when I’m in the early stages of labor? With my first, I was induced early, and never had any of the symptoms I’m having now:

- baby close to being engaged

- period-like pains

- stabbing pains in the vagina

- lower back pain

- tightenings here and there

- wriggling feeling in my pubic area

- peeing more

- feeling like I need to poop all the time, feels like it’ll just come out and I won’t make it to the toilet. Nothing ever actually comes though. (Not constipated by any means)