This battle to sleep

Does anybody suddenly wake up in the first part of sleep with palpitations. The night before I only slept for about 4 and half hours, went out for lunch with family, felt very exhausted but stayed awake until 9 pm that night. The tiredness was overwhelming, I find if that happens I wake up with a start with my heart throbbing, I try not to get that tired but I don,t want to compromise spending time with my family. I came from Wales to London many years ago with no family now I have a successful hard working family I am proud of.