As others have mentioned, it's normal to see the blue color. As for irritation, I had it too (not surprising, as I'm very prone to irritation in the V zone). I was only on the pills for a few days because my lining was a little thin--they gave me the pills to supplement the E2 injections. When I went back for the next u/s, I mentioned the irritation, and they told me to stop the pills because by that time the lining was fine. Don't stop yours, though, without checking with your clinic.