I don't think they class an 11 day LP as short. I think it's only if it's under 10 days.

Normally they prescribe clomid if you aren't ovulating. Putting you on it when you do ovulate could result in multiples if you do fall pregnant.

I'd wait til you've been trying for 12 months before getting a FS opinion.

I had a shortish LP - 12 days - but it did not stop me from conceiving. I did notice however that I would get pregnant when I O'd earlier in the cycle - say CD12 instead of my usual CD15 or CD16. Of course I had no control over when I O'd - I just had to wait for that to happen. The first BFP last year came after 9 months of TTC. Sometimes we just have to be little patient.