Left sided pain.

Vicca • 💗 11/23/10 💗3/14/17 💗4/27/19
Starting last night I've had pain on my left side on and off. Its an indescribable pain. Off and on and comes and goes pretty quickly, leaves a slightly throbby feeling. I'm a week away from my period. I am sexually active and use no birth control or condoms. I don't currently have insurance so I don't wanna go in for something so small. Any ideas?