Pinkish brown discharge

Why is it pink?! Yesterday when I was using my toy it hurt and gave me a stomach ache and now today it still hurts but my discharge was pink. I've stopped and it kinda burns in the opening and it aches at the back of my vagina. It doesn't smell bad. I've started using an off brand vag wash from Dollar Tree and Zantac (heartburn medicine), if that's any explanation.