My heart rate is 110 at the moment, I feel tired and lightheaded, I feel like there’s something stuck in my throat. What’s going on?

Sounds like an anxiety attack. Lump in throat sensation is very common with this.

You're having a panic attack.I know this because I have panic disorder and get these attacks with the same symptoms you have. Anxiety and panic can not harm you..it just feels dangerous...

You have a hiatal hernia; the pressure of which is causing a panic attack and sourcing your other symptoms.

You are having an anxiety panic attack. TRUST ME, I've had PLENTY of those myself. If you're already taking medication for anxiety and/or depression, I'd suggest a regular relaxing exercise. Personally, I do yoga occasionally and have ginger tea in the morning and chamomile in the evening. Both are completely herbal with no added chemicals. I suggest the Yogi brand. It can be found in any Walmart. Warning: ginger is very strong and pretty spicy. They do add black pepper to the blend in case you are allergic. I understand how it feels. It's really scary, I know! Panic attacks can go on for a long time, but if it doesn't seem to be getting any better, go to the doctor; you may have a heart condition. Good luck!

Chill out and have a beer

No idea. Go to a doctor or urgent care. A heart rate of 110 is not very high. Normal is 60 to 100. Someone in Afib with RVR would have a heart rate in the 140s or higher.

Go to a bar and sink two or three tequilas. If no improvement see a doctor.

No one here can make an accurate diagnosis. You should either call your doc or head over at least to an urgent care, possibly the ED.

you may be having an anxiety attack