Hypotension and PCOD share the same cause and can be completely healed. If you really want to know the root cause of this issue and heal, please read my blogs on www.truhealing.com or practo health feeds. Hope that helps
If you want to become pregnant and you are not getting success since 4 years than please do following tests first
For you - S LH,S FSH,S PROLACTIN. S ETRADIOL,
For Husband- semen analyisis
If everything comes normal than you should go for ovulation induction with T clomiphene/T letrozole from 2nd to 7 th day of cycle along with follicular study from 10th day to see how follicle is growing for at least 5-6 cycle and if you not succeed with that than next is IUI/IVF technique.
If you have PCOS than best is exercise and at least reduce 10% of body weight that will definately help and drasically improve your fertility chance
happy to help you