Help...

Okay i don't know where to put this but af came on the 8-13 of this month. 11,12,14,15 was just very light spotting sort of a pinkish color. My so and i have had sex since then. Iv been bloated, headaches, backache, light headed, gassy, and my tummy is bubbly. My so says my boobs are big but i dont notice. Could i be pregnant? Or when should i test or if i should?