Am I crazy or am I pregnant?!

I had my period two weeks ago. I ovulated a few days ago (according to my period tracker) and we had sex the day before, the day of, and the day after (we're not trying to get pregnant we just like sex) Well a couple days after I ovulated I started to get sore boobs and a VERY strong sense of smell, like I could smell the washer, trash can, fridge, my dog, and I was like what the hell why does this all smell so bad? And today I am way nauseous but not throwing up...I retched in the toilet a bunch of times but nothing else. Also really lightheaded. I also had to pee 3 times last night and I haven't been drinking any more water than normal. So am I being crazy or is there something here??? I don't expect my period for 2 weeks so I don't think it's PMS. Could it be anything else? I don't want to be pregnant so I don't think it would be a phantom pregnancy or anything.