You should call your dr to let them you are spotting since this is not normal during pregnancy.
How far along are you though? Some women do have spotting when they were supposed to regularly get their period. You could also spot after having sex too. That happened to me....just from extra bloodflow to your parts and the cervix is more sensitive.
I wouldn't worry about your symptoms going away...they can come and go at any time!
It can still be Ok but it is not normal and they need to do three things, a vaginal ultrasound, "two" HCG blood draws 48 hours apart and also check your progesterone levels which is a thing that can casue bleeding and mc. If it is that you will get suppliment s and everything will be fine. I would also ask for a repeat us in 1-2 weeks to check on things!
Please do not wait to call your dr and you can always go to the er! They can give you suppliments as percaution till they get the results, it hurts nothing!