Running out of breath quickly 😣

An

Is this normal? I feel like once I start walking, I can’t seem to catch my breath and I’ve only gained 5 pounds so far. I constantly have to remind myself to take deep breaths and relax bc I get anxious listening to my own breathing struggles 😂, it happens mostly at night when I’m tired and sleepy too. I’m 25 weeks 1/2 💙