Hallow Dear,
Your history does suggest that there is a possibility that you could be pregnant.
Your menses are overdue for one week, you are having nauseating feeling and you are having a sensation of pressure on the bladder, which might be giving you sensation of
frequent urination. The other breast symptoms may start appearing within next few days to week. They will be engorgement & tenderness of breasts, dark discolouration of nipples &
areola (if this is your first
pregnancy) with widening of areola, Montgomery's tubercles under the areola and secretions from the nipples.
However, pregnancy diagnosis is never confirmed only on subjective symptoms since they can be due to some other causes also. Hence I would suggest you to go for pregnancy test on urine.
Overnight first morning urine sample is the best sample for pregnancy test as it contains concentrated hCG hormone. Since you have completed one week after missing your period, you should get reliable results from this test. Alternatively, you may opt for
Beta hCG test which is very sensitive thought costly, and/or
ultrasonography which will provide you direct visual evidence of pregnancy.
I wish you happy and proud motherhood.
Dr. Nishikant Shrotri