Worried šŸ˜„

Hello all me and my partner are expecting our first baby, i had a missed missedcarage back in march this year. I ovulated on day 21 and my periods should of been due october 31st. So it says im now 5 weeks pregnant! But i know i never conceived that early so im 3 weeks!! But i knw drs will say i am 5. Anyway ive had no symptoms what so ever other than tirdeness a few nights!!! Nothing else now im starting to worry there is something wrong :( has any one else had this?? Or know of anyone who has had no symptoms i would be very gratefull x xĀ