Eratci period

Nicola
Me and my partner are trying to conceive. My period was every 26/28 days. I had a steroid injection 25 Jan which lasts 3 months. This resulted in my period ending completely. They returned the 13th March which lasted for 13 days I norm have af for 3 days. I have not jad a period since but have had sex 8th 9th 10th 11th April. Could it be possible to conceive in this time?