TTC please help

Courtnie • I am 22 and I'm a Mother of a healthy happy lovable 2yr old son . && I'm expecting my second prince 7.14.16 💝
This will be my third pregnancy!  I have a healthy 1 year old son. Had a chemical miscarriage with my second pregnancy and now I'm trying to conceive with my third!!! The second pregnancy was not planned and he didn't want to be in the picture anyway plus I had so much going on at that time so I believe that things do happen for a reason but with my third pregnancy I really want this.. My last cycle as sep. 12-15 and my fertile week is 21st- 26 of this week. I had sex 19 20 & 24 and my ovulation day was the 26th. Could I be pregnant??? Yes I'm fertile and I stopped taking birth control 4 months ago didn't have any problems with my period getting back on track, so
I really need you guys positive opions THANKS 😀