Has anyone ever become pregnant before there next period after ectopic surgery?

I had emergency surgery 6 weeks ago for the removal of my left fallopian tube. I had bleeding on and off since week 4 and at my early scan 3 weeks later showed It was a suspected ectopic, 36 hours later I was rushed into surgery because my tube ruptured and I had internal bleeding. I lost alot of blood and stayed in hospital for 2 days. I am now anaemic and taking 3 200mg iron tablets a day for the next 3 months. My surgen advised me we could try again after my first cycle. It has been 6 weeks 1day and I still havnt received my period. I am worried because I have early pregnancy signs. (could be imagining this) We had sex 16 days ago and i had a BFN 11 days later. We planned on waiting till my 2nd period passed to try again and stupidly had sex unprotected sex as it took 13 months to conceive our first and 7 months for the second. Our first ended in miscarriage at 10w 3d.