New to endo

dull ache sometimes with pain I have had a few times over the years on front left side but back ache before period started last year! Now end of Nov 16 had dull ache left side and back ache before period. Period was four days long and fine but side ache and back ache is still going on a week after period. Dull ache and pain is massive. Had one good day today but now in bed ive got back ache and dull ache!!! Does anyone else have this