Babysitting and ttc #2

Christin • Wife & Mother. Ttc 2 ♥️ law
So I am babysitting a little girl about 4 months old. 
I'm seriously thinking over this whole ttc number 2 deal now...
Never in my life have I ever Dealt with such a bad baby!!!!
My son was heaven sent he NEVER cried and if he did he got hurt or was wayyy over stimulated. To this day as a one year old he is so well behaved and looked at me SO confused while this little girl is screaming BLOODY MURDER!!! 👿👿👿
Then he looks at me and walks over to me and gives me a huge hug like he knew whatever was going on is crazy and I just needed a hug lol!!!usually people call me baby whisperer but today I couldn't calm her for a long time she refused her bottle and gagged on it and was SO dramatic about it I was like what the hell child.
Lol!
Ugh I have been noticing girls are so much more feisty and such criers.
Please Lord if we have another let it be a boy or just a really goooood girl like the first born!!!! 
Anybody been in this situation?!? I thought babysitting was supposed to create baby fever not take it away!