If your partner's penis was inside of you, then you have lost your virginity. There is a common myth that cherries burst in a noticeable way, along with a gush of blood. This simply is not true.
Most girl have partial or no hymens (the official name for 'cherry') by the time they are in their mid-teens. Sports, tampons, masturbation, etc can pop the cherry. Some of these can also stretch out the vagina, making the first time you have sex more comfortable. While losing virginity ranges from uncomfortable to painful for many females, for some it does not hurt.
Yes, you can get pregnant if a condom was not used. If you had unprotected sex within the last three days, emergency contraception (the 'morning after pill') may be able to help you. If the sex was longer ago than that, you will need to wait and see if you get your period.
Be aware that stress can cause your period to be late. If your period does not come, you will need to take a home pregnancy test - and then act on the results.
Best of luck.