Lol! I have a 1st time heifer that's going way before our normal herd calves. Being I don't have a bred date on her (bred by bull at the ranch she came from) I'm watching her like a hawk.
Her udder is SO hairy also!

Makes it hard to tell how developed and full her udder is. I keep being tempted to put her threw the chute an clip it. Helps with cleanliness for the new calf as well.
Keep an eye on her udder and teats. Generally (but definitely not always) there bag will get full along with the teats.
Sounds like she's progressing but probably still has a little while.