3rd trimester - at what point is it too much pain/pressure?

Hi! Thanks for reading.

So I know pelvic pain and pressure is normal, especially in the third trimester. The same goes with back pain and thigh pain and everything pain lol. BUT at what point is it considered too much and cause to call your OB? So baby has dropped (I can tell by the way in carrying) since she has, Ive had discomfort in my crotch and a lot of back pain. Over the weekend I have started getting sharp and extremely painful “cramps?” In between my legs. Sitting or laying help relieve the pain but it doesn’t make it go away. The low back cramps are starting to get very bad too. It’s so much worse when I’m active. The severity comes and goes and seems to be random at this point. I’m also starting to get a lot of cramping/pain in my lower belly, more on the left side. Round ligament pain? Also comes and goes. Basically, I know this all sounds normal but at what point, if there is one, do I start to think labor or issues? I was in tears yesterday from how bad the lain got, but it did go away. It also woke me up in the middle of the night though it was so bad.