Bleeding

So I started the pill 2 months ago. I had bad nausea at the beginning which has now gone away. But the past week and a half I have had bleeding with cramping, the cramping went away today, but I’m still bleeding. The bleeding isn’t like my normal period blood though (TMI) it’s more liquidy and a very dark color. It is getting lighter now but I’m not really sure what’s going on. I am sexually active but we use many forms of birth control (withdrawal (all of the time), condoms (most, now all the time) and I’m on the pill). If anyone knows what may be going on let me know, I feel like pregnancy isn’t possible, and especially for how long I have been bleeding. I also skip the placebo pills (directed by my doctor). If anyone has had something similar or knows what’s going on please comment!!