🤷🏻‍♀️ Could it be happening so soon?

Good evening. Me and my partner decided we want our third baby so 3 weeks ago I stopped my pill and we had sex the same day. 

Since then i Have had very sore boobs/nipples, cramping in my lower abdomen and (tmi) very gassy this past week which I have learnt is a common symptom. 

I am not getting My hopes up as I haven’t even had a period yet but I have also read Up that you don’t even need one!