SSS Maternity Benefit

I'm 8 weeks preggy. My last contribution to SSS was I think 5 to 6 yrs ago. I just started with my job this June 2019. This July, magsstart na ako bawasan for SSS. Am I eligible to file for a maternity benefit? Aabot pa ba? Or can I pay 6 mos in advance na just to be able to avail it? My due date is end of Feb to early March 2020.