Just wanted to give you an internet hug and say it's not surprising you feel low.
You've had 2 deep losses recently and you need to allow yourself to grieve, however long it takes, there is no normal.
Is there anybody you can chat to in real life, just simply to talk it all through and put what you're feeling in to words?
I'm so sorry for your miscarriage and for the loss of your pet - both devastating and will impact your daily life right now.
There will be a lighter day, once you've moved through processing your losses. Don't push them to the side, you'll always feel them, but time will soften the blow and hopefully be filled with more positive experiences.
Can you talk to your GP, perhaps talk about your options? How does your partner feel - are they supportive?
Most of all, don't give yourself a hard time, everything that's happened to you is out of your control and unfair - you're allowed to feel crap.
Come and talk on here some more if you feel up to it.