I'm sore!

We have a 1 year old and don't have sex as much as we used to maybe once a month. Well we recently decided to try for baby number 2. I ovulated yesterday so the day before that we did it twice back to back which we haven't done since we were trying for our first. Now I'm so sore slightly itchy and I'm spotting light pink. Is this normal?

STD came to my brain but I trust my husband plus we have been working from home so like he can't be cheating on me right?! I have such respect and admiration for my husband I'd find it very hard to believe. Maybe just too much friction for one day? For someone who has sex like once a month?