I don't think it's weird to feel this, the trick is understanding why or what you are really feeling, so that you can figure out a solution.
eg are you depressed or have PND in which case it might be that you need a plan for that, which may include medication.
Are you irritated and wantin to get out because you have found yourself in a situation where your life revolves entirely around your family and you've lost sight of yourself? In which case, finding a way to carve out more time for yourself and to do the things you love, without the family, is probably the answer.
Is the problem that actually, your DH is a bit of a twat so you're finding it hard because perhaps you're doing all the childcare, all the mental load etc and he's not really a partner but more like a third child. In which case you have to see if you can get him to step up and take on more.
Is the problem that you're bored and you need to do something different because even if you DO have time for yourself, it's not time you enjoy anymore? do you need to explore alterantive options?
Are you just tired? Exhausted from the relentlessness of it all. Would a weekend away help.
It could be any of these, or any one of a 1000 other issues. I would strongly recommend you think about what is really behind your feelings, and then address the issue accordingly.