Stressing out!

Lindsey
Uhh... ! I absolutely cannot relax at all! I have not been trying long at all, but every time my fertile window gets here I just stress out. I'm probably driving my husband crazy. He told me last night he was taking today off from  BD( oops). I got a very positive OPK on CD 18, we had sex the day before and day after but couldn't on the day of. 
I've been continuing to use my test because if we don't get BFP this time I'm going to use digital. I'm still getting positive OPKs and I'm CD 21. Is that normal? I've been temping and haven't got a temp spike yet. Now my brain is going crazy thinking something is wrong with me.... 😩
I just want a BFP so badly.... Ok my rant is over... Lol.... Thank you for those who read and comment.