Sooooo Frustrated

I'm 40 yrs old and have been TTC # 2 for 2 1/2 yrs. I had been on follistim (one good egg in each ovary but only one tube open), had an ovidrel shot on 9/9 and had my IUI on 9/11. Went to the RE on 9/19 for BW/US (measuring my lining and empty ovaries) and was given half a shot of ovidrel. AF should arrive 9/25. I tested 9/22 and got a +. Definitely has to be the ovidrel shot. So 12 DPO...I tested this morning and got a BFN. Does that mean that the ovidrel is out of my system and I didn't get preg.? I thought it takes 8 to 9 days to leave the system? So now I'm sitting here with heavy, sensitive, hurting-like-hell BBS (even when the bra is off or on), cramping and I'm walking around with my big stretchy jean unzipped and unbuttoned because the bottom of my stomach is swollen and uncomfortable when I sit (Just like my 1st pregnancy). This definitely SUCKS. I guess...why bother testing tomorrow. I should just wait to get my period and start all over. It's frustrating. Maybe I'm just PMSing. Anyone else feel the same way or in the same boat as I am?