Not a BFP, but maybe a faint one?

Ok, so here's my confusion. TTC for 3 months and nothing, I think. But now I'm not so sure because of last month. I was 3 days late last month, wich is strange for me, because I usually have a clockwork cycle. I took a HPT and there was a very faint positive, but the lines weren't the same width, like it said they should be in the directions.So I took a different brand HPT and it was negative. Then I got what seemed like a normal period, only it was a little shorter, but pretty normal otherwise.

Then I started feeling tired, had headaches, back aches and have been super moody. So I took a new HPT today and it was the same weird faint line thing as the first one. I haven't done one in the morning first thing though.

So what's going on? Am I pregnant? Has this happened to anyone else? It's the seemigly normal period that's throwing me off. Am I just making up the symptoms? Aghh, uncertainty is so annoying.