Pregnacy!!!

I have a strange feeling that I'm pregnant. My last period was at 10-14/03 I know is too early but I want to do something! But I don't know what....a test or an ultrasonic??? These will show some results? 
​Last year I had another twin pregnancy in which I lost my twins at 6th month! So it's important for us to have another pregnancy but if it's early we will be disappointed by a negative result!