Hi there, thanks for asking. That could be a sign of everything. That could be migraine
, or it could be beginning of a common cold
or it could be sign of pregnancy
as you mentioned. It is good to check with your doctor or wait for several more days to see how the symptoms progress. Another kit will be reassuring too since many kits have sensitivity of less that 90 percent. I wish you a good health and may be for your baby as well.