Best Friends and EggShells

Below is a really long rant/story. My best friend came over for a week and acted like a 2 year old. She said it was my fault and I keep beating myself up over it.

Do you think it was my fault?

The first day was fine or so I thought, all of her weirdness I just atributed to being jet lagged so I took the baby for a good 4 hours and let her sleep. But by the next day  my bff was starting to have these moments of screaming. She would scream like she had seen a serial killer in the window whenever she was frustrated or the baby was crying. I didn't know what to do so I'd take the baby from her and try to care for the little one myself (usually all baby wanted was milk or a cuddle) at the end of the night she was screaming at me for letting her loose her wallet and she was screaming at my Now husband for not helping her look, as I got down to look under the couch she completely flipped out and screamed at us both to get the F out of the house and she didn't want us to find the wallet. So we ran to our room and let her scream (turns out the wallet was under the couch). 

Now I live in a sunny place where people often go to vacation so I planned on us seeing all the nice beaches and tourist spots since I had other friends in town who'd never been here before. Bff would always agree to the time and place the day before we were going to go and then when it came time to leave she'd be playing on her phone and refusing to leave until it was 5 hours past time to leave. 

Then every morning she would angrily demand I make her breakfast and I would offer her everything in the house or the local shopping area that had a few resteraunts. She'd always decline me cooking for her or cereal and then when I'd take her to the restaurants she'd throw literal temper tantrums because I was making her eat.

At one point her credit card stopped working and she screamed at me and blamed me for that. I spent a majority of my time caring for her baby because if I didn't she'd just scream at the baby and one day she had the gull to tell me I wasn't ready for motherhood and would be a crap mom (I'll add that I had never held a baby before and was now feeding, changing, and lulling one to sleep and the baby seemed happy). Once she even threw herself to the ground in a parking lot and screamed and cried like a toddler because she had to carry the purse holding her wallet and diapers. Towards the end of the week I had an event I needed to go to and I asked her as kindly as possible if she'd help me with my hair (it was maybe a 10 minute task) but she acted upset and put out and refused. That was the last straw I was beyond upset and felt worthless so the next morning I wrote her a note saying she had changed and was being really mean and just upsetting and then I left to go spend time with my family.

She called me and texted me and was so upset that I dare say she was being anything but nice to me and my husband. She claimed that being around me was like walking around eggshells, if she said one little thing I'd start crying.

I know I'm a sensitive person but I feel like spending 6 days being insulted, screamed at, and blamed for everything would make anyone want to cry and be upset. 

The wedding came the next day I pretty much ignored her and her crazy behavior and now that it's over she's upset that I gave everyone a heartfelt thank you but all I gave her was a thanks for coming. She feels like she deserves more than that but I just don't see what good or awesome thing she did besides make everyone stressed out.

She used to be a really amazing and fun person and she used to not act like this towards me but now she acts like a toddler and any minor inconvenience she screams about, everything wrong in the world is someone else's fault not hers, and well screaming at a baby to shut the f up when it's hungry does nothing to make the baby stop crying.

I feel awful and betrayed and it's hard to think of my big day without thinking of her crazy behavior. Was I wrong to want my day to be fun and relaxing? Was it really my job to keep tabs on her wallet, read her mind about the food she wanted, and accept her insults with a smile? I feel like a crappy friend for making her be so upset. What could I have done though?