Last my period june 30

Delayed period :
First of all you have to exclude pregnancy as it's the most common cause for delayed period in your condition . If pregnancy tests were negative your doctor will prescribe medication such as Cidolut nor twice daily for 3 weeks and follow up your condition .
What are the required medical tests ?
Clinical assessment and Urine pregnancy test if your period was delayed ot Blood Hcg level and US Abdomen for pregncny anc PCOs . Your doctor will order FSH , LH and TSH And Prolactine for thyroid disorders and Hyperprolactinemi
What are the causes of menstrual cycle delay ?

1. Pregnancy 
2. Stress amd Anxiety
3. Hormonal disturbance
4. PCO polycystic ovary
5. Thyroid dysfunction
6. Pelvic inflammatory diseases
7. Hypothyroidism 
8. High prolactine

advice :
do the previously mensioned tests and visit a specialised doctor