I think going to see a GP is a great idea.

I've had a lot of experience (unfortunately for me) with depression. Both having it myself and having it in my family. One thing that you need to know is that depression is really really common. Many more people have it than we realise - just start talking about it to people and you'll find that out (I did). You don't have to actually feel seriously depressed to have treatable, clinical depression. You don't have to be suicidal, you don't have to have no good feelings at all, etc.

The next thing you need to know about depression (and anxiety, and other similar illnesses) is that these things are very treatable. Especially when treated earlier rather than later. There are many approaches to treatment and a high success rate. There are many ways of tackling depression that are totally safe for pregnant women and their babies, both medication and non-medication treatments.

If you thought you might possibly have any other kind of illness (diabetes, say, or bronchitis, or anything else you can think of) that was common and treatable, you'd go to your GP and ask them about it. So I really think you should do the same thing here, just in case there is something going on that is treatable. Much much better to go sooner than later, and I hope you'll find your GP is sensitive to your worries and has sensible things to say about it (if not you need to see a different GP).

Like the other posters, I am not saying you are depressed. I can't possibly tell But if I were experiencing the things you describe, I would go to my doctor and discuss it with them, and I would do it as soon as possible. You have nothing to lose and lots to gain, so give it a go.

I do hope things get better for you soon.