HI

I doubt its any thing to be worried about , but too be safe I would just make an appointment, I'm sure your fine! Maybe it has something to do with your cold, possible your head and nose being kinda stuffy could make you think your pulse feels like its beating weird

Are you having any other symptoms? Go see your doctor though too be safe and afterwards you'll feel so much better just having peace of mind. Hope everything works out for you and Good luck