Showing pregnancy signs but no BFP

So my husband just got back from being deployed for 10 months. We had sex on the 29th, no protection obviously because we couldn’t wait, and about 6 days after I started to feel really exhausted. Like I have needed to nap every day. I started getting nauseous and certain things made me sick. My breasts were sooo sore. So I took a test the day before my period was due to start and it was negative. The next day I got what I thought was my period, but no cramps like usual, very light, and nowhere close to what my normal period is. Normally it’s very heavy and there is a lot of tissue/mucus and this time was basically just pink/light reddish blood. Barely used one pad a day and it only lasted 3 days. Well today I wake up and my boobs are huge, my nipples are huge and they hurt soo badly. I’m super nauseous, and feel like I’m about to fall asleep after sleeping 8 hours. Help!? Should I test again, or is it all in my head?