Missed Period, advice wanted please :)

So my period is now four days late and I am conflicted with when I should take HPT. I have been experiencing some promising symptoms that I have never experienced before; never been pregnant so don't really know what I'm supposed to be looking for in symptoms, so I've kind of been relying on google. I have had nausea off and on for about a week and a half now, non stop heart burn, lightheadedness, severe fatigue (like I've never experienced before) and odd CM (but not abnormal or unhealthy) for this time in my cycle and really bad bloating. However I have noticed absolutely no changes in my breasts whatsoever :(. Please someone tell me I'm not losing my mind ;p. Any advice on when I should test, or anyone else in the same boat here or had similar hopeful experiences? We've been trying for almost 2 years now so hopefully this is some good news :). Baby dust to everyone.