If I came inside girlfriend a little then used Trojan with spermicidal could she be pregnant?

It is very unlikely that she could be pregnant if you used a Trojan condom with spermicidal properly. Condoms are highly effective at preventing pregnancy, and spermicidal agents can provide additional protection against unintended conception. However, it is imperative that you wear the condom correctly to ensure maximum effectiveness. Always read the instructions on the condom packaging and follow them carefully to reduce the risk of pregnancy. If you have any questions or concerns, speak with your healthcare provider for more guidance on contraception and safe sexual practices.