Hi Girls

Very embarrassing question...
I had a c-sect 5 months ago and am mix feeding. I am yet to get my period back. For the last week I have had and odd back and pelvic sensation. I wouldn't call it pain, more like a deep tickle or awareness. I have also been getting some yellow watery discharge. It's not smelly but I am worried it's the start of an infection. I don't have a fever and feel otherwise good.
Is this normal? Do you think it's my period coming back? Should I see a dr?