am i pregnant?

i did the fertility test and i found out the week of conseption and its nov. 1-9 so me and my husband did it 1 thr 5. today is the 9th and i have been nause and cramping lately. i had a heachache to day but when i ate more i was fine. so i was wonder if im pregnant or if its just me. i came home and took a pregnany test it was negative. should i wait another week or 2. what should i do.