Support

I have a 28day cycle..AF comes on at almost the exact same hour every single month so I am always prepared for it. However..I am TTC and this month on CD27 I went to the bathroom and when I wiped there was a very very light pink discharge. Just the once. I thought AF was coming so put a pad on and then there was nothing at all..I'm not CD33 meaning I'm what 4/5 days late? I've took 4 HPTs and all have had very faint lines which I posted on the faint lines thread and everyone could see them but I still can't believe it :( I know it sounds silly but I'm scared I'm building my hopes up for nothing. I really want to do a digital test but that will prove to me that those lines may be Evaps when it says not pregnant :( I'm being so silly but this whole thing is so crazy! I've been feeling a lot of niggling pains in the lower right part of my stomach and did have some lower back pain a few days ago..are these pregnancy symptoms? Other than that I havnt really noticed anything. I'm constantly going to the toilet to check for any signs of AF.