Feeling light headed

I’m 22 weeks, and this morning I started feeling extremely light headed, and had to sit down. I figured it was because I haven’t eaten yet, so kinda just ignored it. Well I’ve felt blah all day, and after eating dinner, I stood up and it happened again. I plan on calling my doctor tomorrow if it’s still happening , but I was just wondering if anyone else has experienced this. I know it’s common to feel a little dizzy every now and then during pregnancy, this is just the first time I’ve dealt with it.