Stress pains..

I can't really tell the difference between the good type of pains between the bad ones that I should be worried about? I've been very stressed here lately and I had a pain through my pelvic area around my vagina into my back. Every time I use the bathroom I always check for blood on the toilet paper, I haven't seen any blood at all so I take it as everything's okay .. But the thought of stressing my baby out is stressing me even more!! I can't control it thanks to my anxiety & depression and it's like Stress is an every day emotion. Just worried ..