Symptoms

I'm 3 weeks and a couple of days, I'm getting headache, cramp, bloating and this has resulting in me always going to the toilet for a number 2! I just want to know whether this is the bloating and cramp that is causing this or my baby?? Can I do anything to make myself feel better, I'm supposed to be going out tomorrow. I really don't want to bale on my friend because I can't stay away from the loo!!! Help 😢