need legal advice

hi, my husband and i were married for 10yrs already, without a marriage license under article 34 of EO 209, despite the fact that we did not live together yet before the marriage. we were happy, until i gave birth to our eldest son, a year after the marriage. he brought us to his hometown to settle, unfortunately he started to change and started to to have affairs with different women which his family tolerated. we left(with my 6mos old son)my husband at his parents' house. we still communicated but we almost live separately(davao-bicol), he still visited us every time na umuuwi sya from abroad... seaman po sya. he spent a week or so with us hanggang makabalik sya sa barko. till one day, naconfirm ko na may ibang babae sya na iniuuwi sa bahay ng parents nya. nagsama po sila, although he supported us with 5k a month.. since umuuwi pa rin po sya smin, nagbuntis po ulit ako at nanganak nung april 2013, i was working as a nurse then. after 2013, wala na po kming communication ng aking asawa... hanggang september 2015 tumawag po sya humingi ng tawad at sinabing aayusin na nya ang aming pamilya, without me knowing na pinakasalan nya din pala under the same circumstance ang babaeng kinasama nya. lingid din po sa kaalaman ko na maliban sa babaeng un, may bago pa din syang girlfriend. nalaman ko po lahat ng sya ay umuwi na saming mg iina. pinatawad ko po sya sa lahat ng pgkukulang nya, sa kadahilanang ama sya ng aking mga anak at i saw the sincerity in him na magbabago na sya.. hiwalay na sila ng babaeng pinakasalan nya at hiniwalayan na din nya ang bagong girlfriend.
akala ko po ok na kmi, but then only last month nalaman ko po na hindi pa din tapos ang relasyon nila ng girlfriend nya. nsa barko po sya ngayon at $400 ang allotment nmin mula sa kanya, may trabaho din po ako bilang contractual sa health facility dito samin.. last year, nung umuwi po sya sa amin, bumili po sya ng sasakyan na till now binabayaran po nmin amounting to 17k monthly...
ano po ang maaaring kung gawin legally? i want a fix allotment for my children. sobrang nalilito na po ako... thank you and God bless

so ang habol mo lang is yung taasan yung support sa inyo? una mo gawin lumapit ka dun sa agency nya at dun ka humingi ng tulong. usually helpful naman sila sa mga ganyan case.