Check your urine for pregnancy. If clear, take oral progesterone for withdrawal bleeding. Consult Gynaecologist Now if you need more help. 

You are messing too much with your body and hormones on your own. It’s harmful. Please meet a Gynecologist ASAP.

Pregnancy in this cycle unlikely. You must take a break from ovulation induction and give your body sufficient time to heal before opting for another cycle with GnRH analogue ( injectable medicine for ovulation induction).

No medicine can get your menses early. even if you bleed after medicine, your normal menses will arrive bang on time.

If periods are that irregular, fertile window can only be determined by Follicular study by ultrasound

You can take Tab Pause MF twice a day after food for 3-5 days. It will reduce bleeding as well as give pain relief.

You may require some basic fertility treatment to achieve pregnancy. IUI is very safe and simple-go for it.

This level demands further investigations, probably an MRI of brain is indicated. You must meet an Endocrinologist.

Only confirmatory test for pregnancy is urine pregnancy test and blood test- Beta HCG. Please do them if period is missed.

Seems to be a bit on lower side, but not to worry, there is still plenty of time. You can take pregnancy specific supplements. Also take an opinion of Dietitian. Have a balanced diet of fruits, vegetables, pulses, grains, milk and curd.

Using letroz in this cycle should be ok. Follicular study by ultrasound is the most reliable method to check ovulation.

Burning may be because of infection. Don’t worry about periods, so much.

Could be some infection, will require anti- fungal or antibiotics treatment.