There are several reasons of delayed period besides pregnancy
imbalance, over wt, mental stress, emotional upset, eating disorder
Here, I suggest to repeat home pregnancy test after 7 days to confirm pregnancy and early test is less significant.
If you don't get your period within 1 wk, then one USG lower abdomen and hormone test will be worthwhile. You may require progesterone
pill to induce period. Kindly, consult with your gynecologist and take advice accordingly.
Control body wt, avoid stress, take healthy diet with avoidance of fatty food and sleep properly. Practice safe sex in future.