Are head-aches, nausea, and fatigue profound symptoms of pregnancy?

I had on the 8th of February. I took emergency contraception the same day due to the condom breaking. I got a short period(3-4days) in February[when expected; 23rd-26th/27th] and a somewhat, closer to normal period in March. I was wondering if you can conclude a possible percentage of whther I am pregnant or not. I am under-age and uneligable to obtain a Home-Pregnancy-Test. I know bottom line, that is my only solution but I need help and advice. I am always nauseas, and moody, as well as the feeling of fatigue.