Weird pregnancy symptoms..HELP!

Re
I need some advice. I still have my IUD inserted. My husband and I have decided to not start ttc until next spring, but I have been following my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> just to start preparing. Lately though I've been getting awful hot flashes throughout the day and feeling nauseous at the smell of some foods and other weird things. This all only has happened to me while I was pregnant. I just had my period though a couple weeks ago. I also tested a week before my period with negative results. I'm only one week post ovulation. Am I just having weird symptoms or should I take a test? Don't want to tell hubby to surprise him if I am prego.