Could i be pregnant?

Hey guys ! I am not longer on the pill because it made me feel sooo bad, my fiancé and i were both okay about that! We always have sex with a condom, but we do enjoy some "humping" sometimes were i am on top of him and he's sitting. Last time we done that 100% naked, and came together. When he came, my vagina was still on his penis, but inside but he did come real close. What do you think about it? I feel veeeeeery tired, low back pain, today i took a nap a wakeup nauseous. My periods are due next week-end. What do you all think?

* forgot to add, my vaginal discharge was a bit different than usual. Usually, before my period its very creamy and white and this time, its a more thin cream and transparent, 0 color.