Just off birth control

Maegan
I ended birth control on the 11th of may and did the deed on the 12th then on the 14th started withdrawal bleed. On the 19th and 20th we did the deed a few times ( as he was leaving for a work trip for 13 days.) I have been feeling cramping and dizzy and sometimes a little nauseas. On Sunday and Monday has a little bit of spotting as well as some sore breasts and bloated and urge to pee a lot. prgnancy test is BFN. Just wondering if I could be pregnant or if it's just the effects of coming off the pill.