I protected sex with a sex worker, should i get hepatitis b vaccine?

[Jack22001188]

I had sex with a sex worker on 6/1/2018. and I went to sexual health clinic on 8/1/2018. they did test for everything except hepatitis b and herpes, because the Doctor said that she gonna give me hepatitis b vaccine. However, then nurse that toke the blood sample said i am not illegible for vaccine as it was protected sex. so i did not get tested for hepatitis b and i did not get the vaccine. and they told me to come back in 6 weeks to re do the test.
My question is should i go now and test for hepatitis b or should i wait for 6 weeks?
should I get the vaccine now form private pharmacy cost £120 for 3 doses?

Please share your knowledge.
Also, Is it true that the virus can leave the body without treatment.

Please help I read so much online and it says acute can leave the body and things like that.