My maths teacher picks on me and I'm so upset at him.?

Okaay so first i'll start I'm in Australia and in year 8 on week a of my timetable I have 3 lessons of maths a day, and on week b I have 4. 2 of these lessons on each week is on the same day so this is 2 days of maths in week a and 3 days of maths in week b . So on week a I had the wednesday and friday off and they were the days we have maths I had them off cause I was on my period and I have EXTREMELY BAD PERIOD PAINS . I can't do anything. So I didn't go on wednesday cause they were bad and then I woke up okay on thursday so I went but after an hour at school they came back really bad but I stuck it out cause my mum couldn't pick me up but I was crying in class and at lunch and couldn't go to sickbay cause we have a policy at our school go to sickbay = get picked up. So then I didn't go on friday. I try taking tablets and using water bottles but I swear they do not work ! My mother and grandmother was the same they had really bad pains and they couldn't do nothing. Anyways then on week b the next lesson of maths I came late cause I had a dentist appointment (If i didn't go to this one I would of had to wait 2 weeks and I needed to go) and I came for 30 mins of the lesson. Then on friday we had maths we had a test and I had no idea about it, and neither did my friend cause shes been away but she was away cause she didnt wanna go to maths (everyone hates him) and before the test we went and told him and he told her to do a revision task but I still had to do the test . I did what I could but he said we could put out hands up if we didn't understand so I did then he started yelling at me saying I was away for 20 lessons ( 10 lessons a week) and I told him I was sick I didn't wanna say I had my period and he said I needed a medical certificate I can't get one for that! and then he said my mum and dad should I took me to the doctor and I lost it cause my dad died and I was just having a bad day so I walked out. He says I talk in class and need to stay focused but I don't talk that much I talk when we are doing the set work and his doing his own thing (not when his explaining ) and its not a 20 minute conversation its a turn around quick joke thing. But he moves me and everyone else is talking. I've had enough I thought he liked me ? But lately his being really rude. I'm so mad at him.