Hi Dr. I worry a bit about what just happen this afternoon. Firs I have to say I am healthy 18 weeks pregnant. For lunch I had tuna can with avocado, tomato and one boiled egg. to fisish, a glass of milk...right after I start having this intense cramp in my chest/stomach, I couldnt take deep breath, I didnt say anything thinking it will pass but after 10 minutes of getting worst somebody said I look pale,...I start feelin deezy and blurry and said I will faint...and I did for couple of second. People beside me woke me up and the pain went away 5 min after...I am in bed now recovering...what could it be? Could it be dangerous for baby? Thanks for your time and consideration.