Lub Dub Lub Dub

My heart is pounding against my chest. I looked at my watch and started counting. 1 2 3...125 beats per minute. I am not exaggerating anything. I can even feel the beats on my throat. It's been quite a while since I had palpitations like this. Sometimes there's pain on my chest but quite tolerable. i don't know what's going on. I haven't taken any medications or caffeinated drinks. I think I need a visit to the doctor. What do you think?