Pains in 2nd Trimester

Hey I’m a first time mom so this is all new to me . I’ve been having some lower abdominal/vaginal/pelvic kind of cramping and tightening today that comes in waves, nothing consistent other than it happening all day . I’m also having lower back pain but not sure if that’s just from being pregnant and maybe doing too much around the house or not being active enough ? I’m not sure what contractions or Braxton Hicks feels like as I have endometriosis and that pain is FAR worse than what I’m feeling now . Im in pain but not excruciating or huntched over like my endo would put me in. I’m just trying to figure out if this is normal or something I should call OB about . Like I said I’m first time pregnant and 23.5weeks along so I’m not sure what I should be watching out for around this time or if all of this is just literal growing pains .

Thanks for suggestions.