Normally when does are in heat they flag their tails, vocalize more, sometimes mount other does, stand to be mounted, move their tails rapidly when pressure is applied to the rump, may have some discharge, and may be a bit swollen when in heat.
If she is not settling, she would be coming back in heat.
But since she looks like a dairy breed cross, she may not come in heat until the fall. Dairy breeds are strictly fall breeders (like deer).
First of all very pretty girl She looks to be Alpine and or Toggenburg mix. They are seasonal breeders only breeding Sept-Feb (give or take a month or earlier or later) Have you had her in with the buck the whole entire year? What kind is the buck, and has he bred without issues to any of your other does? If the answers to the ?'s above are yes then.....
Second that comes to mind that I just learned not too long ago, is copper deficiency. I brought home 2 Nubian/Lamancha does 4yrs old last May. Decided to get my own buck in November, and noticed that only 1 was showing signs of being bred. I was confused as to why only 1 got bred. When I got them the one was black, and the other one had reddish tinge to her, I thought that was normal.. She also showed signs of having uneven hooves as well. I got a hold of a lady who helps people with goats for a living, she automatically knew it was severe copper deficiency. I ordered the copper bolus from Jeffers, gave it to her at the end of May, her coat is now black, still working on her hooves, but after a couple weeks she should be good as new. When I read about it copper deficiency will cause breeding issues. My buck did try repeatedly on her with no luck.... If your goat is a Toggenburg mix, she has a reddish tinge look to her coat..., and I've seen Toggenburg's and they are a chocolate color. I was using the Manna Pro minerals for goats too, but I have sheep now so I will copper bolus all 8 of my goats from now on... Here are the before and after shots of Rosie a few months ago, April I think, and yesterday she is the one on the right, red collar. Not sure if this helps or not, but it sure helped my Rosie girl