Period / Pregnant?? PLEASE HELP ME😔

I need a little bit of help...

So me and my Boyfriend are trying to conceive,

My last period was the 10th July and lasted for 4/5 days. 

recently my periods have been regular and normal. This cycle he hasn't pulled out everytime, it was when i was fertile and ovulation day. (There was numerous of times)

Ive been feeling sick, my tummy has had weird feelings, some of the time ive been having weird stiches at the sides of my tummy. Also my boobs/nipples have been really sore. Today, i have noticed my sence of smell has been really strong, when i went the toilet my discharge has smelt really weird. However... I did a test yesterday and it came out negative. On a different app i have it says im due tomorrow? But im not sure.... What do you think this could be? What would your advise be..

Thankyou for reading!❤️❤️