Thank you for posting your question. I will do my best to help you.
Usually, ovulation occurs on 14th day of the cycle and menstruation
on 28th-30th day of cycle ( one is likely to conceive if Intercourse happens during 12 to 14 days of the menstrual cycle).
First day of the cycle is to be calculated from the day 1 on your period (day 1 will be day one of the cycle)
Dont be alarmed. There are home tests for pregnancy
-preg card test kits available over the counters which you can take as early as in 2weeks after conception. Please purchase a pregnancy kit and test.
If its negative you can test again after 2- 3 days & reconfirm .
If unsatisfied, kindly consult a gynaecologist for further evaluation &advise.