Thanks for the query to H.C.M. Forum.
However you didn't mention the menses date so very difficult to predict any thing.
The symptoms are tiredness
, lower abdominal pain
( mild pain & heaviness) , lower back ache, cramps .
These all symptoms are suggestive of pregnancy
You can test home pregnancy test after 7 days ( late date of period).
If 13 & 15 days are near ovulation days then chances of pregnancy are there.
If you want early test then get in HCG (blood test
) for confirmation of pregnancy.