I am a little over 17 weeks, and for the past few weeks I’ve felt short of breath and tired. Just chalked it up to normal pregnancy stuff, even though I was never this tired with my first baby in the second trimester though. I’m normally pretty active, but lately I’m tired even going up stairs. Today at work I had to teach a class, and I was standing and talking for about an hour. About 45 min in I started getting really dizzy. I knew if I kept going I’d faint. I just did the rest of the class sitting (luckily it’s pretty casual and nobody really minds). But it was like standing and talking was just too much effort. I felt better after sitting down. I’ve noticed that talking for long periods has made me out of breath other days too. So weird, anyone else experience this? I don’t think I was dehydrated or hungry.