Yeah it could be the reason.. because my sister is going through the same. They feel that theres another one on the way. Poor thing, am 34 weeks with my first baby and am so scared for labour.
Maybe teething. Happened around that time with my son.
He is only cries with me he acts normal if anyone else like my husband or sister has him. I know hes not colic.
Could be a tooth coming in my son always cried like that when it happens
He may just be gassy or constipated.