Hi Lalaa,
Yes those are all very common side effects. However an increase in anxiety is also a side effect for the first few weeks or so and they are also symptoms of anxiety. Either way they will go away so don't worry
I'm on week one of ven and my stomach is so tight is actually hurts. It's really uncomfortable and my muscles feel really worn out all over my whole abdomen. If you look a few posts above SADnomore has a really good tip about how to relax hen by breathing deeply and sighing it out audibly.
It's all normal as far as I can tell. I'm suffering from them all too.
Sara xx
EDIT: SADnomore has also done a great thread about how to deal with different side effects. Give it a read