Depressed

Is it me or because of my hormones makes me so anxious, depressed... I felt so lonely.... Hello mums, im posting here since i dont want everyone i know  will know... Since this is a close group and i felt i needed to let t go... Im 30weeks pregnant... It all started when i entered my 4th month.. I smell cigarettes all the time, i cant breath, I felt so depressed, so lonely even my 2 boys and hubby are there cheering me up.. I love my job, but even so I felt that I am losing my mind.. Then one of OBs told me to stop drinking coffee yes, i drunk coffee even i was 4 month so I did stopped. I felt okey until 2 days back I started smelling cigarette again and now i feel

So lonely, depressed. Is it because Im pregnant, or because I started drinking coffee? Is it my hormones... I am worried it wont go away until i will have the baby... I dont know, i just felt so differently... Anyone experienced this? Thanks