Ddos attack entry level processes woo commerce security system admin

Website is generating too many entry level processes causing errors. Limit on hosting is 30... Think website has been under ddos attack not sure on details, have reloaded website from auto backup and it is up and running again... Entry processes increase to limit when I direct any traffic to site, I require an experienced person to find out what the issue is and fix whether it is malware, attacks or faulty scripts and resolve. Would like all plugins updated and cleaned/tidied please (all inactive themes and plugins removed, etc) and general audit of the infrastructure and implementing improvements where possible. Site is currently being protected by cloudflare on under attack mode. Website was down for two days and we need it up and running smoothly again, thanks.