NST strip question?

I have them weekly and have never had my contraction monitor pick up so much activity. Is this from baby moving? The nurse said she didn't see a single contraction in these patterns but I sure felt them. Drove me nuts she said that because baby moves at every other NST and it never looks like this... I'm 36 weeks and went in for swelling, migraines, and blood pressure and they sent me home without doing any tests other than hooking me up to this. 
Edit: yea I'm assuming t may not have been hooked up right because I know I had at least 2 contractions (not that it matters but it irks me being told I didn't when I know I did. She also told me I have no swelling even though my calves go straight to my ankles. 🙄)