Conceived on supposed to be mens day

LPM ko po ay Oct 9, nagdo po kami ni hubby ng Nov 7, days before my expected menstration so we thought na safe. But lo and behold, napreggy ako. If LPM ang basis, 6 weeks preggy na ako pero if conception, 4 weeks pa lang. Nag utz na ako no pregnancy evidence at the time of scan pero thick endometrium and pcos left ovary with corpus lut. Positive sa pt, 170 miu sa b hcg. Emotional ride tlga. 1. Meron din po ba ditong same case ko? 2. Normal level po ba ang hcg ko?