Feeling nauseous

My husband and I have been trying to conceive since September now. I ended what I thought was my period on the 29th and the last two days I’ve had a pink discharge and cramping. I’ve been taking a prenatal for quite a few months now and ran out and husband got a different kind then what I had been taking. This morning I took the women’s one a day prenatal and a few hours later, I’m noticing I’m nauseous. Is it smart to take a test or is the nausea from the new brand of prenatal? What was the pink discharge? That’s not my normal after my period.