No details about other complaints , age, any tests done or any medications received. Normally BP level given can be left alone. Some times due to exhaustion, stress, sweating, vomiting , motions and standing stiil for long time may cause giddiness etc. Take plenty of water or liquid frequently, ordinary salt ( Lemon Juice) , regularity in daily chorus . You should feel alright. If no relief you should see a Physician for clinical examination, general check up and related investigations to find out the cause. and necessary treatment