Am I pregnant ? Please help I am 17?

Okay I am 17 years old I am on the mini pill however from the (28th - 1s)t I missed my pills completely forgot. Anyway I had egg white cervical mucus from the (30-1)and me and my boyfriend had unprotected sex on the 31st he cummed in me I sat with my legs up because I was in pain after the sex and it was the only comfortable position. Next morning had cramps and then I experienced some withdrawal bleeding lasted 4-5 days. Anyway on the 5th-6th of June I have experienced some pinching pain in my abdomen it doesn't last for long however I checked my cervix it feels very soft like lips also after checking I had a few spots of bleeding more like pinkish brownish discharge on a tissue when I wipe from going to toilet.I (is this implantation bleeding) I'm also nausea and spit up a bit my nipples are a little tender. I am not due for my period until the 13th-14th. According to my mucus and chart I should have ovulated around the 31st-1st ( 30 day cycle).oops.
My last period was from the 15th of may to the 21st of may. If this helps my sister has fallen pregnant on the mini pill as well she used it correctly. I missed four pills and had unprotected sex can I be pregnant. Im currently 11dpo. Help me please!!

Update: still have the brown discharge/ spotting little tinge of reddish or light pinkish colour its now brown again I'm up to 3rd sugar pill (red section of the mini pill). I'm due very soon am I pregnant??

First of all, stop checking your cervix. You aren't trained to know what you are feeling and you could very well introduce bacteria that could cause infection.

With that said, you will have to wait to see if your next period comes as expected. There is no way to determine pregnancy by symptoms alone.