OVERWHELMED :(

I'm 20 and 11w4d pregnant with my first child. Most days I feel fine but today I woke up and just cried. I feel completely and utterly overwhelmed right now. My mum says this is completely normal,  and that its just my hormones all over the place, especially because I'm a FTM. I love my baby already but sometimes I can't help but cry :( I get to see my baby for the first time next week and I'm so nervous about something being wrong. I'm so happy and excited 95% of the time but the other 5% I feel so down :(  I was just wondering how many other mums have experienced this feeling...