What do you think?!?!

The top picture is from December. I got AF from the 11th till the 16th. You can see when SO & I BD. 

Well I was supposed to get AF on the 4th then it didn't come until the 18th. Well we BD before I got AF. Well the last two weeks, I've had slight insomnia. Only in the morning (4am-7am). I've also had constipation, some bloating, hot flashes, headaches, off and on cramping.. But it was like a pulling cramp. Fatigue, and I had nausea a couple times. Also last night I tried eating a cheeseburger and I couldn't.. My stomach would start feeling weird, like anytime I'd take a bite id start to feel kinda blah.. Well me and SO were driving home last night and I burped. Well I thought I had to burp again and I threw up a little in my mouth. (Tmi) and ewww it was so gross haha. But anyways. Could I be pregnant? Or should I just BD through my fertile window and then if I don't get AF then test? Help!!