Need help!

I didn't get my period in August. 4 negative hpt, 2 negative blood tests. I should be due for my period Sept 21st. Where my ob wants me to take another home pregnancy test before giving me medicine to bring on my period.

The past two days I have been SICK. Nauseous, dizziness, stomach pains. Today I've had mild cramping and back pain, as well as A LOT of CM. Very slick and clear.

Any clue what's going on? Could I have gotten pregnant in September? Typically I don't have these types of symptoms before my period, but maybe it could be that?

I'm so frustrated. I don't want to get my hopes up again. Really thought I'd be pregnant in August when I missed, but I guess I wasn't. Afraid to get hopes up again.

What do you think?