Am I playing tricks on myself?

Since I've became TTC I notice every little detail that might change in my body, and I believe I could be playing tricks on myself yet again! But I guess there's no harm in asking if you guys think I could of concieved so anyway, the other day I had a brown patch in my underwear which wasn't number 1 I thought it could be ovulation but test says I'm not ovulating, then I thought maybe old blood but my last period was quite a while ago and it wasn't my period starting, so obniosuly I thought implantation but I've had no more. I've had strange belly aches above my belly button and period pains I'm not sure if it is my period starting as I came off the pill 3 months ago and my periods are irregular right now so I can't even track them, I've had frequent trips to the toliet so I thought okay it could be a water infection or something like that. My boobs was a tiny bit sore last week but not a lot and there not painful no more, I've had miragranes and felt sick but not physically been sick. (Never suffered with miragranes before) my bra is a little bit tight on my back but then again I could just need to get a bigger back size😂 also I've noticed a mood change normally I'm quite snappy and can come across as rude but I have been nice and kind to people and I feel like a changed person. I read online pregnancy hormones could do that, I feel like if I test I will see a positive whereas before I knew it would be negative but I was just checking so could someone please tell me if they've had them symptoms. Tia sorry for long post