Heavy lifting 😞

So I have this box that holds work stuff its not crazy heavy and I've been lifting it every day for like a year so you know... If your body is used to it then it should be fine... But today I was trying to move it from one car to another and lots of annoying complications with the cars later I worry I may have injured myself. I felt pain in my lower abdomen (right where the baby is at this stage). And I don't feel much of anything while sitting. There are random twinges of pain every once and a while, but nothing regular. Obviously if there's any spotting I will head to the ER, but do you guys think I'm ok? I'm so worried and scared... Help! I'm 14w 5d.