Okay I asked about this before, but I am about a week late on my period ( and I'm never late). I came off my BC pill this month, to start back the sunday after I get my period with the new med's. I am so bloated my stomach is sticking out unusually. I have tested twice and both say negative. I don't know what to do, could I have a cyst? or should I be worried that I am pregnant?

You might have cyst. Better consult your personal gynecologist or medical practitioner. There will be no reliable answer here on the internet since every individual may be differ from others' condition.

i would give it another week, stress or diet can make you late, and worrying about it won't help. if you do not start in a week , call the doctor.