Hello - this is my first Mumsnet post! I found out last week that I'm pregnant for the first time. I am five weeks three days today and am so very excited! However this morning I was in a meeting (a stand up meeting) and suddenly came over really lightheaded, I felt like I was floating. Next thing I know I'm on the floor with about 8 people looking down at me. I don't think I blacked out, but I was shaking white heavily, was very sweaty and felt so lightheaded. I recovered fine and was ok within 10 mins but it's shaken me up and I'm now worried this may turn into a regular thing. Has this happened to anyone else and is there anything I can do to keep it at bay??