Normal or ?

So last week on a Thursday I went to the pools and got really bad sun burn

Me and my 2 other cousins as well

After we went home, we were getting ready to sit for dinner and I felt like I was gonna vomit , it was like right in my throat but I can't vomit (last I vomited naturally was 2013) so anyways I ran to the toilet and stuck my finger in my mouth and vomited. I went back and had like 2 spoons of pasta and ran back and vomited. My husband picked me up from my uncles and we went home where I vomited again. All 3 times though I felt the vomit but I had to stick my finger in my throat to vomit. So my question is, could it be a pregnancy symptom or was it cause the sun? Cause my cousins didn't vomit

Thanks