Dizziness/stomach pressure

All through the night last night, I was experiencing this headache/dizziness that was like I was drunk, I felt a bit sick with it but didn’t vomit And today, I’ve gone to work & felt this extreme pressure like I’m going to burst in my stomach. Also note I’ve been tested for pre-eclampsia before & came back negative. I’m not sure if this is normal for this stage of pregnancy or if I should be concerned because Everything I’ve read is telling me to go to a doctor, but I haven’t got any other symptoms of anything.