Anxiety

I know this is a pretty personal topic but is anyone in here dealing with some serious anxiety with adjusting to mommy life? It's getting so bad that I can barely handle anything anymore. I'm stressed constantly. I'm now having to (and choosing to) stop breastfeeding due to needing certain medicines for a medical condition and that's causing a lot of guilt and anxiety also. The lack of sleep is killing me with waking twice a night and working full time. I've never dealt with anxiety before until now and I hate it. I feel like it's hindering me from being a great mommy.