Okay ladies, I need opinions.

Throughput this whole pregnancy I have experienced constant tightening like she's always pushing herself all the way out. I've cramped the whole time, and I have had multiple kidney infection s. I woke up this morning and keep getting an almost shocking feeling on my left side and it's like they come in waves, I know it's not my kidney because it's too low and I know it's not round ligament because it's too high. After the sharp pain sometimes she tightens up more, sometimes she doesn't. But this pain in my side has been consistent all day. She is still moving around and I don't have any pains in my abdomen or pelvic area other than the pain on my side and the tightening feeling.. is this something I should be worried about, does it sound like preterm labor or something else? should I go to the hospital just to be safe or...idk what to do because I work thirds and I'm supposed to work tonight and I do a lot of heavy listening and moving around for 9 hours straight. Does it just sound like BH or..idk I don't remember what any of it felt like really...
What do y'all think I should do?