Need to vent.

I found out I'm 4 weeks pregnant. This baby wasnt planned and I was on birth control. I have a 5 and a half month old daughter. I've considered abortion but I know I'd be too guilty afterwards. I'm having trouble though, I dont love this 2nd baby yet, instead I feel awful and sad. I feel guilty for my daughter, I wish I had, had longer with it just being us 3. That I had time to watch her grow up. I'm laid in bed and I can't sleep.

Can someone reassure me it gets easier🥺