Thanks for your query.
it is good you are planning for kid & started having unprotected sex,Due to unprotected sex your periods have become irregular or skip.There is nothing much to worry ,continue trying.& consult gynec for investigation of both of you.First investigation is husband semen analysis
.if that is o.k. then start you test to find the cause.
‘Hope I have answered your query, I will be available to answer your follow up queries, “Wish you Good Health and trouble free speedy recovery”