Feeling strange

AF is due sometime between tomorrow and five days from now (my period was over a week late last month due to another chemical pregnancy so everything's a little thrown off) I feel hungover. Obviously not from alcohol but that's the only way I can describe it. Im going on three days now very dizzy and nauseous with hot flashes and feeling faint. I took a test this morning and it was negative. Am I just getting sick or am I possibly pregnant? My boobs are super sore but that always happens this time of month. Help!!