Thanks for the query.
Your cycles are almost regular.
The spotting you have seen could be implantation
bleeding or premenstrual spotting.
To come to one conclusion, better to wait for one more week.
If you do not get periods by that time, go for urine pregnancy
Start taking folic acid
tablets from now onwards.
If the test comes negative, consult gynecologist and take tablets for withdrawal bleeding. Then plan for pregnancy with her advice.