Headaches and nausea, could this be an early sign of pregnancy?

So me and my husband are trying to conceive, since trying around ovulation I’ve had headaches and felt quite nauseous on and off. The two week wait is driving me mad. Could these be early signs of pregnancy? I am prone to headaches but only one everyone 3-6 months. These headaches have been lasting for up to 4 days 🤷🏻‍♀️. 16 dpo, due my time of the month on Monday.