The relays may be overloaded, try adding the recommended relays in your settings if you haven't already. Otherwise you can check out nostr.watch to add more relays
Send me an email at [email protected] or DM me on nostr at
npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s (paste this in search to find me) and I can help you out