23rd of April. Had sex. Only tip went in. Condom work but concern about pre-ejaculate getting on the outside on the condom while putting it on. Took morning after pill 3 days later. Got a negative preg test when period was 6 days late. Day after I bled. I think it was a period?? But the morning after pill symptoms include bleeding. After period ended I started getting period pain in my back for about a week then it stopped. Now I keep getting hot flushes and feeling a little sick and my stomach keeps pulsing. I'm really worried. Could I still be pregnant?