Hi
My last period was on the 18th of June and lasted 7 days so it ended on 25th of june, I then had unprotected sex on the 30th of June and then again on the 7th of July.. Im now 4 days late! My period usually is a 28 day cycle but sometimes comes a day or 2 early but never late.

I have taken 1 home test and was negative

What i want to know is, Is it possible to fall pregnant with those dates 1 being 13days into my cycle the other being 20 days in.

And how long should i wait before testing? or going to the doctors to have a blood test..

At the moment I have slight breast tenderness, mild cramping on left side on and off a thin milky discharge and i keep going to the toilet. and Ive been really hungry which is very unusual for me as i just pick at food.

Also just wondering my partner is a twin, what are the chances of having twins if i were pregnant?

Thank you all in advance for any help you can offer...