Getting frustrated, opinions!?

So the past week or two I've had on and off cramps. I have an irregular cycle but this just seems different? Then recently within the past, maybe, 3 days I've been nauseas on and off. Once to the point where I honestly thought I was going to throw up at work with a customer in front of me... I've taken multiple tests and it's still a BFN. I haven't made a Drs appt yet because I can't seem to get thru the phone queu line on my lunch breaks. Any ideas besides telling me to go see my dr? Just feel odd. Crampy, nauseas and very tired in spells.