A little worriee

I’ll be 13 weeks tomorrow with our third baby. Out of no where my upper abdomen has been cramping a lot. It’s maybe like a 5 on the pain scale. I got super tired out of no where. I feel dizzy and kinda spacey. I called my hospital and they didn’t seem worried. This is all after going nearly 48 hours with out keeping fluids or food down yesterday and the day before. But today I have been keeping it all down. I’ve been keeping in contact with my hospital but I haven’t yet gotten to speak with my doctor. Had any other women ever felt like this? I don’t ever remember feeling like this with my other 2 babies.