Does it get easier???

I'm lost. I'm so overtired I'm a zombie. We have twins who sleep 2-3 hours at a time then we change and feed them. They have reflux and colic. Sometimes it's more of a struggle than other times. We have given them mylicon, tried gripe water, white noise, baths (they hate), rocking, cool most humidifier, music etc. 
They are six weeks old and it seems like no matter what we do they are miserable. Dr tested their poops and said they have a protein sensitivity so we are on alimentum. They wake up screaming crying from their naps but seem better when they are fed until they have loud farts/poop. We burp them lots to try to help alleviate the pain. Ugh. I read posts about other moms and their 6 weeks old sleeping through the night and having "happy babies". 
We are first time parents what are we doing wrong?? Does it get easier??? Do you ever get to "enjoy the baby"??? I'm so overtired and losing hope in being a FTM:( I love them so much but it's so hard going through the motions each day with two screaming babies. Their dr said it will get easier but she's not home constantly w them. :( I didn't think being a new parent would be this hard or challenging. My DH held when he's not at work. We don't have family in this state. Do I hire a pt nanny??? What do I do??