Newly pregnant

I’m only about 5 weeks, but I feel so weird! I knew I would be emotional, but I really just don’t feel happy. I feel too tired/down to be happy. I feel really guilty about this because I feel like I should be excited to be pregnant, but I really feel almost depressed. I just don’t feel like myself! Is this normal at all?? I’m on an anti anxiety med that I’ve been on for 5 years that I thought would be helping...