As my username suggest I am having a pity party.
I will try and make this as short as possible.
I have 4 DC eldest is DS17. He has major behavioural issues poor mental health and puts a huge strain on the family. He has been with camhs since he was 11.
I have 50 50 with ex and we co parent well.
Yesterday I had the paramedics out as I suffer with asthma and due to a cold my inhaler just was not working. They came treatment given all good. Had ooh gp booked today for script for new inhaler steroids and a spacer.
DC were back with dad today he collected them at 12.
I went to gp got home and was in the process of packing as spending weekend with bf and was meeting him and his mum for lunch.
Just before I left dtwins 13 turned up soaking wet and upset. DS17 had come home to dads and kicked off.
I called ex but phone switched off.
I drove to the house DS17 was there but no sign of ex. He was his usual abusive self towards me.
Anyway eventually found ex who was driving streets looking for dtwins with a flat phone.
I had called bf and said to just order lunch as it had all kicked off and I was running late.
He said "great thanks for messing mum about"
I apologised said there was nothing I could do and still needed to collect my meds.
Went to chemist feeling totally shit as everything was now messed up.
Waited 20 minutes to get served and was told £27 please.
I burst in to tears.
I do not get prescriptions often I mean like a year ago and then its 1 item my inhaler.
This was 3 items.
That £27 was all I had till Tuesday (recently changed jobs so struggling this month)
So I paid now have come home unpacked and I have no milk or bread and no money left to buy any. Plenty of food in so wont starve and dc with dad until Tuesday afternoon but I just feel so sorry for myself.
DS's behaviour ended my marriage and has probably ended my relationship.
He has ruined his siblings childhood as our whole lives have to revolve around him.
I just want to sit here and cry while whining how shit my life is and there is nothing I can do about it.
AIBU...I probably am but will whine anyway 
Also sorry it was so long.