"I started going in there after the first 2 rounds and calm her down and put her back to bed, but I am so tired, that I eventually let her come with us."
It's not surprising to me that she has started this behavior again. You give in. You let her back in the bed. If you don't want her there - don't let her be there! She knows if she throws her tantrum long enough and hard enough, mommy is going to give in and let her sleep with you. Trust me, I know how important sleep is...so you will need to make a firm decision and not look back. Can you put up with a few nights of being drop dead tired or do you want to make sure you get a good nights sleep? If you decide that she needs to sleep in her bed and sleep through the night without disruption, then those are the standards you need to uphold.
If she is not hurt or sick, let her have her tantrum. She'll eventually figure out that her screaming and protesting will not cause you to make an appearance, and she'll go back to sleep.
If you simply cannot bear to do that, if you must make an appearance then make it as boring as unemotional as possible. Go in, help her back into her bed, say "Time to go to sleep" then leave. Talking, negotiating, justifying, begging only serves to arouse her even more which is definitely not what you want.
Good luck!