Dear Katrina,
During breasfeeding the menses can get delayed. More regularly you breastfeed the baby, more are the chances of delay in menses. This is due to the raised levels of hormones. Such period is called as Lactational amenorrhoea.
If you are exclusively
breastfeeding the child - during day as well as night, it does provide a
contraceptive protection too. However, only breastfeeding during the day and top feeding at night may continue the Lactational amenorrhoea without
contraception protection.
This time your Lactational amenorrhoea has extended for one more month than what you had in your all previous pregnancies. This should not bother you. May be you are more regularly and exclusively breastfeeding the baby this time.
Agreed, you have
pregnancy like symptoms. Your husband has undergone
Vasectomy. I hope you had additional protection of condom during first three months after vasectomy. In vasectomy, the vas is severed at the proximal part near the testes. The sperms which are distal to the site of vasectomy are capable of fertilizing; and they need about 3 months time or 15 ejaculations to leave the body. Your husband was tested twice and has found to be sterile. I hope you did not have any intercourse before this confirmation. If this precaution was not taken, you have to confirm the status of your pregnancy.
You have carried out three pregnancy tests which have reported you to be non-pregnant. It is a better option to go for
Beta hCG test which is very sensitive and can report pregnancy within 10 days of the conception when the urine pregnancy test may report false negative. If this test also reports hCG values
In that case, sore nipples may be attributed to breast feeding. If the baby is sucking the nipples instead of whole areola, it may cause sore nipples.
Dizziness and nausea may be due to some other causes like gastrointestinal upsets. Please report to your Obstetrician about it.
If you are confirmed to be nonpregnant, you may take Tab. Deviry for 5 days and within 4-7 days you will get your menses. I feel from your history that you would not be pregnant. Hence, instead of doing the hCG pregnancy test, you may directly opt for Tab. Deviry test. You should get withdrawal bleeding; if you don't, you may do the above mentioned ordeal or report to your Obstetrician directly.
I hope this helps you.
Dr. Nishikant Shrotri