Welcome to HCM.
I think as result of anxiety
you are feeling the above mentioned symptoms. The urine pregnancy
test should be taken at least week after missed period, if done earlier there will be chances of it being false positive. I advice you to repeat the test a week after and preferably with early morning urine sample as it's sensitivity will be more.
For headache, over the counter analgesic
will be enough.
Hope I have provided the information you needed.
Wish you good health. Take care.