If you are getting better there is no need to worry, maybe go in and test your urine because cramping after peeing and spotting might be a uti, but you are probably good if it's going away :)

honestly it's better to be safe than sorry, personally I think you should have went in. I'd never risk my baby's health. But alot of people experience spotting in pregnancy and everything is fine usually. if you didn't want to go in the least you could do is call an on call nurse at your ob's. Definitely be sure to tell your doctor about it, sometimes spotting is a sign of placental previa