Bomb shell

I think I could be pregnant I had a small what I think is implantation bleeding 2 days ago. Waiting for AF in 5 days time...however my boyfriend has just informed me if I'm not pregnant he wants to start using condoms because we can't afford another baby ( BTW I think we can) I tryed to hold back my disappointment and just smile and agree. Now I don't know how I feel about if I am pregnant the whole excitement has just gone!