Female advice please

Hey ladies,

I need some advice and a bit of a reality check right now.

My period is late by 7 days now (it's been pretty consistent for the past half year or so, ever since I graduated from college). The last time I had sex before my period was late was January 22nd so it hasn't even been 2 weeks yet.

My breasts are being a bit more sensitive then usual. My cholesterol is higher than usual. I've been experiencing some cramping but no period has followed suit. And yesterday I was experiencing headaches and the food I had wasn't appealing or agreeing with me too much.

My boyfriend and I always use protection (condoms) but I thought all these were all signs of pregnancy so I took 2 at home test yesterday. They both came out negative.

Am I taking the tests too early? Or could there be another reason I am having all these particular symptoms? I'm pretty nervous and anxious. Has anyone else gone though something like this before?