Despite for help and answers..

My boyfriend and I were having sex yesterday and the condom slipped off and we didn’t realise until after he had came in me. I’m on the pill so I should be still protected and okay right? After it happened I went to the toilet and the rest of his cum and everything came out so I thought I was all good, now I’m so so stressed and I cant sleep or anything I’m so worried and today made it even worse I went to the toilet and I had thick white clumpy discharge coming out of me and I know what normal discharge looks like but this looks different.. I’m scared it’s still cum? I don’t know what to do I’m thinking of going to the chemist but I’m so awkward and there is just so much going on. Please help!