It’s hard to answer when you have not any information.
Your age?
Are you taking heart medications or blood pressure?
If so you have them a change in your medication recently?
Do you have other symptoms that those mentioned?
do you have palpitations at other times of the day or after exercise?
I suggest you go to the hospital.

without laughing, it’s not trivial at all. My fiance had palpitations, it had intensified and he died a month ago at age 60 of a heart attack. see the doctor as soon and even more specialists