I would really appreciate input!!

Ok, so my boyfriend wears a condom and pulls out before orgasm everytime we have sex but I'm not on bc. I had really strange brown cervical mucus starting on day 23 of my cycle and it lasted for exactly one week. I am now on day 37 of my cycle with some cramping and slightly tender breasts. I had a lot of white cervical mucus the last few days but today it is pretty dry although I keep feeling like my period started when it didn't. I have irregular cycles that usually last somewhere between 28-38 days. Anyone?? I don't know what to make of this and am starting to get concerned.