My Period Was Come On 24feb And Stop On 28

My period was come on 24feb and stop on 28 feb . i have sex on 5 march with condom .this is my first time. I dont know that condom tear or not. Bt till now the period has not come . and test kit giving nagetive result . i am in tension so i want to take unwantedkit .is it big problem. Please give advice fast