Yes, letrozole is safe for upto 6- 10 cycles during a lifetime. None of the medicines you have mentioned cause body pain. You may take a break of a couple of cycles or fast track to the next stage of treatment.
MD - Obstetrtics & Gynaecology, FCPS, DGO, Diploma of the Faculty of Family Planning (DFFP)
Pregnancy can occur only one day of cycle that is ovulation day so unprotected sex around that day only important. As only one day in month nature should be given 12-24 trials (12 to 24 months) before couple need any active management by Gynecologist or infertility specialist
Then lot of reports are done and different treatments are tried. Patience is important. IVF is last but not initial option.
TORCH IgG values in positive range indicate past infection.
If IgM values are negative, there is no current infection, and does not require any treatment.
There could be several other reasons for not getting pregnant.
To check for fallopian tube patency, get Hysterosalpingography done on Day 9 of menses.
Fallopian tube blockage needs to be treated by surgery, laparoscopic preferably.