30 weeks struggle?

Just reached 30 weeks and the past week or so I've been having a hard time and I just want to know it's all normal I guess. I am so tired 24/7 and yet when I lie down to sleep my brain just won't stop so I'm having to go to work some days on 3 hours sleep . To add to that I keep getting a racing heart and feeling kinda in a panic at odd times . I'm feeling a bit down about it all and just hoping baby is okay in there and that the next two months will pass quickly