Kicking and Screaming and Tantrums, Oh my!

I remember seeing kids throwing monster temper tantrums in the store or the park or wherever and their poor parents trying to get them to stop. I remember thinking to myself "my kids won't do that. No way. Not mine". HA!
I took the girls to the park this evening around 4:30. It's been cold and rainy and even though it was still cold today, the sun was out and I thought I would let them play and enjoy it for at least 30 minutes. And for about 40 minutes we had a lot of fun. Then I suggested that we should go inside because it was getting colder and it was time for some dinner. That is when all hell broke loose. Grace started saying "no... no... NO!" and getting upset. I told her we had to go. She then started screaming bloody murder. She's a loud child anyway, but this was the loudest I've ever heard her get. She really put on quite a show. Tears, red face, screaming. I tried everything. Got down on her level and tried to talk to her (multiple times). Let her lay on the ground and throw a tantrum while I stood by and ignored her. Finally I had to get her to go so I told her if she didn't come now, I would be carrying her inside. She screamed at me. So I picked her up and carried her in. The whole time Hailee was being very good and just held my hand while we walked. We got inside and Grace went to time out where she screamed some more. After she was done, I did my best to explain to her that we do not behave that way and because of her behaviors she would not be getting any of her special treats tonight (chocolate soy milk or yogurt), no video (Sesame street or little movie before bed), and that she would be going to bed early (7:30 instead of 8). I know she doesn't quite understand it all, but I have to start somewhere and I will NOT let her act like that without any consequences.
Needless to say, I was at my wits end tonight. I'm all alone this evening too since Justin is at work and left at 3:30 and won't be home until tomorrow morning. Ugh. I feel like I need a small vacation. Like a spa day all to myself while Justin watches the kids. Or if we were back in the states maybe I could just go for a drive all day and just explore back roads by myself blaring music with the windows rolled down, then stopping somewhere secluded and taking a walk just praying and talking to God.
I hope I don't sound like a bad mom. But I just sometimes feel like I never get a moment to myself that I can just relax and not have to worry about folding laundry, cleaning the house, making dinner, changing diapers, bathing kids... you get the picture. I love my family, but doesn't everyone need a little break now and then? Doesn't it make us better people to get away sometimes and remember who we are?
Well, for now, the best escape I can give myself is a bubble bath. I don't have any nice bubble stuff so it'll be with "Elmo's Watermellon Bubbles" after I clean out all of the toys from the tub. *Sigh* bring on the relaxation....