I am pregnant and I'm having trouble breathing, eating and I've been freezing what's wrong with me?

See youf doctor ASAP. You may be short of breath from asthma. While shortness of breath can be normal in pregnancy, asthma can also start or get worse. If you are cold all the time, you may be having thyroid problems. This is easy to find out with a blood test.
Please see you MD. I do not know what is wrong with those few symptoms. Could be the flu or could be other things going on. Trouble breathing is a red flag and i suggest you call and get in to see your OB as soon as possible.