Femara and changing cycle length

Have any of you taken Femara and it change your cycle length? I'm a few days late, but I had 4 negative tests before we left on vacation. Now im stuck with inlaws so cant really justbrun and grab a stick...

Yesterday I was up 23 hours so I discarded my temp this morning because I had 4 hours sleep and was up 3 hours later than usual.

I usually have 24-26 day cycles. Tomorrow is CD 29 and no cramping, which is unusual for me. But I dont habe any pregnancy symptoms. But no period symptoms either except moody.

Just ready for my cycle to start sonee can start Femara one more time before

IUI (I'm travelling in Jan so we have to wait for an IUI).

Also, if I dont start in the next 4 days, my fertile days will be while I'm out of town which would suck. Last month hubby had to go to MN while on fertile days so to miss 2 months in a row of timed intercourse is annoying.