Shortness of breath...25 weeks

BlissfullySweet • Married to my awesome husband 💑👫 Mommy to my precious boy 💙😘👦🏻and 2 sweet girls 💜💜😘😘🧒🏻👶🏻. Baby #4 (the finale) due August 2021. 👶🏻💙🙏🏼
Is anyone else feeling really short of breath?? I'll be 25w in two hours and my breathing lately, ESPECIALLY today, has been really bad. I'm constantly finding myself having to take these deep long gulps of air and sometimes I can't talk because I just need to breath. It's like I can't do both. 
I have an appointment with my ob on Monday so will be telling her what's going on, but wondering if anyone else is experiencing this at this stage in pregnancy.