Guys need help w/ leaking timing cover gasket.

I had a minor leak from the timing cover gasket after a new water pump install. It was very slightly leaking from the timing cover to block. I retightened the bolts Im not really sure if this is going to solve my problem or not. The bolts somehow worked themselves loose oddly enough. Still trying to figure out how that happened.

Is there anyway of oil and coolant being mixed up in that cover at all?
I hate the idea to tear the motor back down but if need be Ill have to start asap. Thanks a lot